|Midhun Madhav said: (Mar 27, 2017)
|Pozzolana Portland cement does not attain same strength after three months. It is a slower process than OPC. That is the reason why low heat portland cement is given. The option is A itself.
- 1 Which cement type has very high rate of strength development?
- 2 What are the properties of low heat cement?
- 3 What is the lowest grade of cement?
- 4 What is the strength of PPC cement?
- 5 What cement is waterproof?
- 6 Which type of mortar has the highest strength?
Which cement type has very high rate of strength development?
3. Rapid Hardening Cement – Rapid hardening cement attains high strength in the early days; it is used in concrete where formworks are removed at an early stage and are similar to ordinary portland cement (OPC). This cement has increased lime content and contains higher c3s content and finer grinding, which gives higher strength development than OPC at an early stage.
- The strength of rapid hardening cement at the three days is similar to 7 days strength of OPC with the same water-cement ratio.
- Thus, the advantage of this cement is that formwork can be removed earlier, which increases the rate of construction and decreases the cost of construction by saving formwork cost.
Rapid hardening cement is used in prefabricated concrete construction, road works, etc.
What are the properties of low heat cement?
Low Heat Cement is specially blended to provide a lower heat of hydration in concrete. This unique attribute makes it ideal for mass concrete pours where the rate of temperature rise and the maximum temperature achieved must be controlled in order to reduce the risk of thermal cracking.
Which cement has highest compressive strength after 3 days?
Answer (Detailed Solution Below) – Option 2 : high alumina cement Free NWDA JE Civil 2021 – Mini Mock Test 1 50 Questions 50 Marks 60 Mins High alumina cement: (i) The raw material used for its manufacturing consists of 40% bauxite, 40% lime, and 15% iron oxide with a little percentage of ferric oxide and silica, magnesia, etc.
Ground finely at a very high temperature. (ii) As since C 3 A is not present, the cement has good resistance against attack by sulfate and some dilute acids, and is particularly suitable for sea and underwater work. (iii) High alumina cement offers higher rate of gain of strength as it attains 20% of it ultimate strength in a day and substantial portion of the ultimate strength with 6 to 8 hrs.
(iv) High alumina cement has an initial setting time of about 3.5 – 4 hrs and a final setting time of 5 – 5.5 hrs. (v) High alumina cement is preferred for use in the cold region due to the high heat of hydration. (vi) Fineness ≤ 225 m 2 /kg (vii) Expansion ≤ 5 mm Rapid hardeneing cement: (i) It is the type of cement which developed higher rate of gain of strength and must not be confused with quick setting cement which only set quickly.
- Ii) The cement attains strength at the age of 3 days equivalent to that attained by OPC in 7 days.
- Portland pozzolana cement: (i) The cement is prepared by inter-grinding cement clinkers with 10 to 15% pozzolanic material.
- Ii) Pozzolanic material is essentially siliceous or aluminous compound which in itself do not possess any cementitious properties but when finely grinded in the presence of water reacts with Ca(OH) 2 released during the hydration of the cement and leads to the formation of a cementitious compound.
Last updated on Sep 27, 2022 The National Water Development Agency (NWDA) is very soon expected to release the official notification for the NWDA JE (Junior Engineer). In the previous recruitment cycle, a total vacancy of 16 was there. The vacancy is expected to be higher than that of the previous year.
What is the lowest grade of cement?
Answer (Detailed Solution Below) – Option 3 : M 20 M20 is the minimum grade requirement of concrete for reinforced cement concrete work with mix ratio 1: 1.5: 3, means 1 part of cement, 1.5 parts of fine aggregate and 3 parts of coarse aggregate.
What is the strength of PPC cement?
Portland Pozzolana Cement (PPC) – PPC is special blended cement useful in general construction work and is especially suitable for applications in aggressive environmental conditions. It can be confidently employed in construction of hydraulic structures, marine works, mass concreting such as dams, dykes, retaining walls foundations and sewage pipes.
|Covered under IS:1489 (Part I)
|Covered under IS:1489 (Part II)
PPC with fly ash as Pozzolana is more popular in the country owing to the easy availability of quality fly ash from modern coal-based thermal power plant. With the advent of fly ash based PPC, the availability and use of calcined clay based PPC has more or less been decimated.
- PPC provides improved workability, has less segregation and bleeding, increased water-tightness and reduced tendency of lime to leach out.
- It produces less heat of hydration and offers greater resistance to the attack of aggressive water containing sulphates and chlorides.
- It improves the durability of structures and also the strength of concrete over a period of time by making it more corrosion resistant and impermeable.
It protects concrete against alkali-aggregate reaction. The minimum compressive strength of PPC after 28 days, as prescribed by BIS is 33 MPa or 330 kg / Cm 2, However, the ultimate, long-term strength of PPC is better compared to OPC 53. Since the pozzolanic material reacts with calcium hydroxide liberated by the hydrating Portland cement and forms cementatious compounds, PPC makes the concrete more impermeable and denser as compared to OPC and it is this property coupled with its cost effectiveness that has helped in its emerging more popular in the construction industry.
PPC is manufactured either by inter-grinding Portland cement clinker, gypsum and fly ash obtained from thermal power plants or by intimately blending OPC and fly ash. The percentage of fly ash in PPC permitted by IS:1489 varies from 15% (in minimum) to 35% (maximum). The fly ash to be used for manufacturing of PPC should conform to IS:3812 (Part I) – 2003.
The colour of PPC containing fly ash as pozzolana will invariably be of slightly different colour than that of OPC, depending on the colour of the pozzolonic fly ash that is used in the manufacture. However, the colour of cement, whether it is PPC or be any other grade, has no relationship with the quality of cement.
The colour of the cement is gauged by its C4AF content and the pozzolonic material used. The higher the C4AF the darker the cement will be. Similarly, the lighter the colour of the pozzolonic material, the lighter the shade of the cement will be. As such, there is no governing specification for the colour of cement.
One can not gauge the quality of cement by looking at its colour. The quality of cement can be assessed only by testing its physical and chemical properties.
Which cement achieves high strength in less days?
220.127.116.11 Types of cement – OPC : OPC is by far the most common cement used in India. Depending upon the 28 days strength of the cement mortar cubes, as per IS 4031-1988, OPC is classified into three grades, namely 33, 43, and 53 grades. It is expected that for a particular grade of cement the test results of the mortar cubes do not fall below the specified value.
Rapid hardening cement (IS 8041-1990) : Rapid hardening cement starts gaining strength and develops strength at the age of 3 days that OPC achieves in 7 days. Higher fineness of grinding and higher C3S and lower percentage of C2S increase the rate of development of strength. Extra rapid hardening cement : When calcium chloride (up to 2%) is intergraded with rapid hardening Portland cement (PC), extra rapid hardening cement is produced.
Although the strength of extra rapid hardening cement is about one-fourth higher than that of rapid hardening cement at 1 or 2 days and 10%–20% higher at 7 days, it is almost the same at 90 days. Sulfate resisting cement (IS 12330-1988) : During OPC production when tricalcium aluminate (C 3 A) is added restricting it to the lowest permissible value, it results in sulfate resisting cement.
- It also has low C4AF content.
- Use of this type of cement is more beneficial for structural elements in contact with soils and ground water, where there is significant presence of sulfates, seawater, or exposure to the sea coast.
- Portland slag cement (PSC) (IS 455-1989) : PSC is produced by intimate interground mixing in suitable proportions of PC clinker, gypsum, and granulated blast furnace slag with permitted additives.
Except for slowness in hydration during the first 28 days, other attributes of this cement are similar to OPC. Therefore it can be employed for mass concreting. It has very low diffusivity to chloride ions and therefore has better resistance to corrosion of steel reinforcements.
Quick setting cement : At the time of clinker grinding, reducing gypsum content produces quick setting cement. This cement can reduce the pumping time, making it more cost-effective. Super sulfated cement (IS 6909-1990) : This is a hydraulic cement produced by intergrinding or intimate blending mixture of granulated blast furnace slag, calcium sulfate, and a small amount of PC or PC clinker or any other lime in the proportions of 80–85:10–15:5, respectively.
IS:6909-1990 (reaffirmed 2016) provides more details. Low heat cement (IS 12600-1989) : This type of cement has low heat of hydration and displays a slow rate of gain of strength. However, the ultimate strength is the same as that of OPC. The cement is produced by intimately mixing together calcareous and argillaceous and/or other silica-, alumina-, or iron oxide-bearing materials burnt at clinkering temperature and grinding them.
Hydrophobic cement (IS 8043-1991) : Hydrophobic cement is obtained by intimately mixing together calcareous and argillaceous and-or other silica-, alumina- or iron oxide-bearing materials burnt at clinkering temperature and grinding them with natural or chemical gypsum with a small amount (say 0.1%–0.5%) of hydrophobic agent, forming a film which is water-repellant around each cement grain.
The film is broken out when the mixing together of cement and aggregate breaks the film. This exposes the cement particles for normal hydration. The film-forming water-repellant material is expected to improve workability and also protect from deterioration due to moisture during storage and transportation.
Masonry cement (IS 3466: 1988) : Masonry cement is made by intimate grinding and mixing of PC clinker and gypsum with pozzolanic or inert materials and in suitable proportions air entraining plasticizer resulting normally in fineness better than OPC. It finds use mainly for masonry construction. Expansive cement : In this type of cement, there is a significant increase in volume (instead of shrinking) vis-à-vis PC paste when mixed with water.
The key element is the presence of sulfoaluminate clinker mixed with PC and stabilizer in the proportions of 10:100:15, respectively. This process not only improves the density but also the integrity of concrete. Oil-well cement (IS 8229-1986) : Oil-well cement is used by the petroleum industry for cementing gas and oil wells at high temperature and pressure.
- There are eight classes (A to H) defined by IS:8229 that are manufactured.
- Each class essentially contains hydraulic calcium silicates.
- As per the IS code, no material other than one or more forms of calcium sulfate are interground with clinker or blended with ground clinker during production.
- The common agents, which are known as retarding agents, are starch, cellulose products, or acids to prevent quick setting.
Rediset cement: Cement which yield high strengths in about 3–6 hours, without showing any retrogression is rediset cement. It has similar 1- or 3-day strength as OPC. High alumina cement (IS 6452: 1989) : As per the IS specifications, high alumina cement is obtained by either fusing or sintering aluminous and calcareous materials and grinding the resulting clinker.
What cement is waterproof?
In cement: Types of portland cement Waterproof cement is the name given to a portland cement to which a water-repellent agent has been added. Hydrophobic cement is obtained by grinding portland cement clinker with a film-forming substance such as oleic acid in order to reduce the rate of deterioration when the
What is cement type II?
Portland Cement Type I, II, III: Which one to use in a concrete countertop mix? Portland cement comes in a variety of different types. In the United States, these types are classified as Type I, II, III, IV and V. Only Types I and III are necessary for consideration by concrete countertop fabricators; the benefits of Type II cement are generally irrelevant to the concrete countertop industry.
- Type I is ordinary Portland cement, and it is available in white or gray.
- Most concrete countertop professionals use white cement, despite its higher cost, due to its more precise color consistency.
- Type II is a moderate sulfate resistant cement, important when concrete is cast against soil that has moderate sulfate levels, but irrelevant to concrete countertops.
Type III is a high early strength cement. It is ground finer and reacts faster than Type I, so the early compressive strength gains are greater. However, the ultimate strength is not higher than Type I. Concrete made with Type III will have only slightly higher 28 day strengths than concrete made with Type I, all else being equal.
- However, concrete countertops are installed within a few days of casting, and there is no need to wait 28 days to cure.
- Type III is available in white or gray, but white Type III is difficult to find in small (less than pallet) quantities; it often has to be special ordered.
- Given this, and the fact that there is no need to increase the early strength of the concrete, it is best to stick with Type I cement.
Type IV and V are often used in special construction applications where high sulfate resistance is required or a low heat of hydration is important. Neither of these types are practical choices for countertops.
You will sometimes see cement labeled as multiple types, such as I/II or II/V. Conclusion: The high compressive strength of well-designed concrete countertop mixes is determined mainly by good concreting practices, such as low water-cement ratio, not by the type of cement.It is best to stick with Type I cement and to understand all aspects of, such as,
: Portland Cement Type I, II, III: Which one to use in a concrete countertop mix?
Does darker cement have more strength?
Technically, ‘No’. The strength of cement does not depend upon its shade. Cement is a composite material. It is manufactured by heating various raw materials such as limestone, silica, alumina, iron oxide etc. which are found naturally from clay or shale, to a very high temperature.
- The mixture is then ground into the fine powder known as cement.
- According to the Cement Manufacturer’s Association, limestone forms around 95% of the total raw material for cement production.
- Cement manufacturing also consumes other minerals like gypsum, Quartz, bauxite, coal, kaolin (china clay) and iron ore in varying amounts.
Usually, fresh cement gets its colour from the nature and colour of its raw materials used. Since raw materials are procured from different mines, the colour of the cement vary from factory to factory. The shade may even vary across different batches of cement produced in the same factory.
- Quality of the cement doesn’t depend upon its shade.
- It mainly depends upon the quality of the raw materials used, fineness of the cement, and the quality control measures adopted during its manufacturing process.
- Cement is known as Portland cement, as its colour was similar to the colour of natural soil in the ‘Portland’ town of England.
Manufacturing of cement involves two types of processes, wet manufacturing process of cement and dry manufacturing process of cement, In both these processes, the raw materials interact with each other in the kiln and form more complex compound during the manufacturing process. According to the Portland Cement Association, Bricklayer Joseph Aspdin of Leeds, England invented cement early in the 19th century by burning powdered limestone and clay in his kitchen stove. Since its colour resembled the colour of Portland stone on Isle of Portland, he named it as Portland cement.
Normally, the colour of ordinary Portland Cement is greenish grey. In blended cement, various pozzolana materials such as fly ash, slags, rice husk ash, micro silica, etc. are added replacing bulk quantity of cement to achieve higher strength at lower cost. The blended cements are eco-friendly since they use disposable by-products which otherwise harm the environment.
The pozzolana materials can be either artificial or natural products. Therefore, their colour too differs based on their sources. Therefore, the shade of blended cement also differs based on sources of the pozzolana materials. To know more about fly ash, slags, rice husk ash, micro silica, etc.
Read pozzolana materials, Different types of aggregates are used to make the concrete. We have already classified aggregate based on their size, shape and nature of formation, Aggregates play an important role in concrete. The colour of the finished concrete is also affected by the colour of the aggregates, and to a lesser extent by the colour of the cement.
Ergo, the colour of cement is not a criteria to assess either strength of cement or of concrete or of the mortar. Hence, opting for the cement based on the colour is misleading. Remember, IS mark is mandatory for all cement manufacturers in India. Hence, all cement must have basic properties and strength that are needed irrespective of raw materials, brand, colour, and manufacturing process.
- Hence, the shade does not matter.
- Final Words Colour of the cement depends on the source of raw materials, sources of its pozzolanic admixtures and manufacturing process.
- However, colour is not the yardstick to measure the strength and quality of cement.
- Choose the cement whichever is stable, sustainable, and good for house construction.
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Which type of cement develops high strength quicker than the others?
A Closer Look: Cement Types I Through V Editor’s Note: This is the second article in a year-long series explaining common raw materials used in precast. By Kayla Hanson, P.E. E vidence of cementitious material use dates back to the beginning of recorded history.
Egyptians used a blend of cementitious materials as a mortar to secure each 2.5-ton quarried stone block of the Great Pyramid more than 4,500 years ago. Romans employed a pozzolanic cementitious blend to construct aqueducts and other engineering marvels including the Pantheon, whose roof is still the largest unreinforced concrete dome in the world.
Europeans in the Middle Ages used hydraulic cement to construct canals and fortresses, some of which still stand today. Today, we primarily use portland cement in our concrete. Ingredients in modern portland cements are carefully selected, manufactured, tested, and regulated for quality and consistency.
Portland cement specifications ASTM C150, “Standard Specification for Portland Cement,” outlines 10 cement types, five of which are generally regarded as the primary types of cement used in precast plants: Type I – Normal/General Purpose Type II – Moderate Sulfate Resistance Type III – High Early Strength Type IV – Low Heat of Hydration Type V – High Sulfate Resistance Type I Type I cement is considered a general, all-purpose cement and is used when the special properties of the other cement types are not required. Type II
Type II cement is specified in scenarios where the concrete product is required to exhibit increased resistance to sulfates. Concrete made with Type II cement can be useful for underground structures in areas where soil and groundwater contain moderate levels of sulfates, as well as in roadways, transportation products, and more.
Type III Type III cement offers expedited early-age strength development. Because colder ambient temperatures can cause cement to hydrate slower, Type III cement is often used in cold weather concreting applications to expedite strength development in the early stages of cement hydration. Type III cement is also beneficial when precasters cast the same form twice in one day.
Type IV Type IV cement generates less heat during hydration and curing than ordinary Type I portland cement. When conducting mass pours or casting large-volume concrete products, Type IV cement is often used to lessen the amount of heat generated and reduce the risk of flash setting or thermal shock.
- Type IV cement’s ability to generate less heat during hydration is also beneficial in hot weather concreting applications where fresh concrete may cure at an expedited rate due to high ambient temperatures.
- Type V Type V cement is used in concrete products where extreme sulfate resistance is necessary.
Coastal structures, piers, underwater tunnels, submerged structures, foundations, roadways and transportation products are all common applications for Type V cement.
What is high early strength cement?
High early strength concrete is one of the type in high performance concrete. A high early strength concrete means that the compressive strength of the concrete at the first 24 hours after site-pouring could achieve structural concrete quality (compressive strength > 21 MPa).
What type of cement is preferred to use when high early strength is desired?
Describe Cement ? Cement is a construction material in a powdered form composed up of argillaceous & siliceous materials which exhibits cohesive as well as adhesive properties to form a solidified mass in presence of water. Joseph Aspdin patented cement in 1824 A.D. and named it Ordinary Portland Cement due to its resemblance to the rock found in ” Isle of Portland”. How is cement manufactured ? The raw materials such as limestone, clay or shale is extracted from the quarry and crushed to a very fine powder and then blended in the correct proportions. This blended material, also known as Raw feed or Kiln feed is passed through preheaters/precalciner into the kiln where it reaches a temperature of about 1400-1450 o C. The kiln is a cylindrical tube (upto 200 metres long and approx.6 metre diameter) with one end attached to the preheater and the other at the firing end. The raw feed enters the kiln and reaches the burning zone where almost all vital compounds form and finally is passed through grate coolers to form into grey nodular particles (1 mm – 25mm) termed as clinker. The clinker stored in Clinker silos are ground into fine powder in the cement mills alongwith gypsum. Gypsum is added to regulate the setting time of cement. What are different types of cement ? Brief on the applications of different types of cement. Bureau of Indian Standards has classified cement into different types as per their composition and suitability to different construction requirements. OPC-43( IS 269 -2015) – General civil construction works including residential, commercial and industrial buildings, roads, bridges, flyovers and irrigation projects OPC-53 (IS 269 -2015) – Used for high-rise buildings, bridges, flyovers, chimneys, and pre-stressed concrete structures where high grade concrete ( > M30) is normally required PPC IS 1489 (Part I for FlyAsh Based & Part II for Calcined Clay Based) – 1991) – Useful for general construction works and especially suitable for works in aggressive environmental conditions, employed for water retaining structures, marine works, mass concreting, such as dams, dykes, retaining walls, foundations, and sewage pipes. PSC( IS 455 – 1989) – Used for general civil engineering construction but mainly preferred for construction of marine structures and in coastal areas where excessive amounts of chloride and sulphate salts are simultaneously present in groundwater. Also, can be used with advantage for mass concrete works, thanks to its low heat of hydration. PSC also reduces alkali-aggregate reaction. Masonry Cement( IS 3466 – 1988)- Used for making mortars for brickwork and plastering. It has low compressive strength, only 5 MPa. Contains air-entraining agents and other mineral admixtures, which improve water retentivity (retention capacity), plasticity and workability of mortars Sulfate Resistant Cement (IS 12330 – 1988 )– Preferred where the concrete is in contact with the soil, ground water, exposed to seacoast, and sea water or Conditions where there is a risk of damage to the concrete from sulphate attack Hydrophobic Cement (IS 8043 – 1991) – With substances such as oleic acid, naphthenic acid, pentachlorophenol or stearic acid that are famous for their film forming nature. Facilitates storage for longer periods in extreme wet conditions. Rapid Hardening Cement (IS 8041 – 1990) – Used for special purposes when a faster rate of early high strength is required. Concrete masonry manufacture, concreting in cold weather, and in pre-cast production of concrete and in the places where quick repairs are required such as airfield and highway pavements, marine structures, and bridge decks. What are the main chemical compounds of Cement ? Tricalcium silicate(C3S), Dicalcium silicate(C2S), Tricalcium aluminate(C3A) and Tetra calcium aluminoferrite (C4AF) are the major chemical compounds inherent in cement.3Cao. SiO2 (65%) – Hydrates rapidly. Responsible for early strength (upto 7 days) of cement 2CaO.SiO2 (15%) – Hydrates slowly,Responsible for strength beyond 7 days 3CaO. Al2O3 (7%) – Liberates more amount of heat during the first few days. Contributes slightly to early strength. Cements with low percentages are more resistant to sulfate attacks 4CaO. Al2O3. Fe2O3 (8%) – Reduces clinkering temperature. Colour of hydrated cement due to ferrite hydrates, What is hydration of cement? Cement being a hydraulic material reacts chemically with water to form hydrated compounds known as hydration of cement. During the hydration process heat is evolved (Exothermic reaction) which is termed as Heat of Hydration. Hydration of silicates produce hydrated compounds such as C-S-H gel (Calcium-Silicate-Hydrate) and CH (Calcium Hydroxide) which lends strength to the cement paste.2CaSiO + 7 HO -> 3 CaO.2SiO.4HO + 3 Ca(OH) + 173.6kJ 2 CaSiO + 5 HO-> 3 CaO.2SiO.4HO + Ca(OH) + 58.6 kJ What is Pozzolana ? Pozzolana is an important ingredient (cementitious material) in PPC which is commonly used in the form of: Fly ash, Volcanic ash, Silica fumes, Calcined clay. Pozzolana helps in hydration of the unhydrated cement particles and may contribute to the strength of cement/concrete even after 28 days. Pozzolana also helps in reducing the heat of hydration thus enhancing the durability of the structure. What are the various test parameters of Cement ? Test parameters of cement are broadly categorized into Physical and Chemical. Physical tests entail Setting time (Initial & Final), Compressive Strength (3,7 & 28days), Fineness, Soundness (Le-Chat & Autoclave), etc Chemical tests include the tests of Loss on Ignition, Insoluble Residue, Magnesia, Total Chlorides, Alumina Ratio, Lime Saturation Factor etc. THANK YOU Website – pradipjha.simplesite.com
Which type of mortar has the highest strength?
By: Joseph Contreras As discussed in our October newsletter article about repointing, mortar is the material that is used to bond two units of masonry together. Although sometimes confusing, it is very important to select the correct type of mortar for a construction project.
While all mortar should be resistant to moisture infiltration, mortar mixes vary based on strength, bonding and flexibility. The compressive strength of mortar is measured in pounds per square inch (PSI). It’s a common belief that the stronger the mortar, the better; however, if the mortar installed is stronger than the masonry units, it will cause the softer masonry to spall and crack.
Bonding refers to the ability for mortar to adhere to the unit it’s applied to. Good boding properties are necessary when building a foundation; however, this is not the case when repointing a structurally sound wall. High bonding mortar would most likely dirty the face of the wall, resulting in an undesirable aesthetic.
- Flexibility might be an important factor in determining the correct mortar mix.
- This mortar property, referred to as elasticity, allows for the movement of structures.
- A flexible mortar with a higher concentration of lime might be the better choice for repair work on a tall building.
- A stronger cement mortar would not be able to withstand the sway, or the expansion and contraction, of the higher structure.
Finding the correct balance between strength and elasticity is essential in choosing the correct type of mortar for the job. All traditional mortars are essentially a blend of sand, Portland cement and hydrated lime. These three ingredients are mixed at different proportions depending on the intended use. Type N mortar is the most common type, and is usually recommended on exterior, above-grade walls. This general-purpose mortar has good bonding capabilities. And since the cement is not overburdened by Portland, it cures more slowly and allows for better workability.
- Type N mortar has a compressive strength of about 750 PSI, which is ideal for use with semi-soft stone or masonry applications.
- It’s more elastic than a high strength mortar, which helps to prevent cracking and spalling of adjacent masonry units.
- Although commonly used in setting bricks, Type N can also be used for repointing newer brickwork.
Type M mortar is the strongest of the four, and has a compressive strength of 2500 PSI. Type M mortar should be used when the structure has to withstand high gravity and/or lateral loads. Type M mortar is also a good choice for hard stone projects where the compressive strength of the stone is greater than 2500 PSI.
The characteristics of Type M mortar make it ideal for below grade applications, such as at foundations and retaining walls. Type S mortar is a medium strength mortar achieving a compressive strength of approximately 1800 PSI. Type S mortar can be used on at/or below grade exterior walls, and hard coat traditional stucco systems.
The strength and bonding properties of Type S mortar are greater than that of Type N, and the increased amount of lime in Type S allows the mortar to withstand excessive moisture and increases its bonding and elastic capabilities. Type O mortar has the weakest compressive strength, approximately 350 PSI. Although there are other scientifically modified blends of cement, these four types are the most commonly used forms of mortar. A thorough understanding of the structural requirements of a project is necessary in order to choose the correct one. Building owners and contractors should consult with a structural engineer if there are questions as to what type of mortar should be used. Recent Posts