What is the purpose of doing CBR Test?
The Rockwell hardness of mild steel is 70 HRB.
The Rockwell hardness of mild steel is 70 HRB.
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What is the purpose of doing CBR Test?
What is the Rockwell hardness of mild steel and aluminum?
The Rockwell hardness of mild steel is 70 HRB.
The Rockwell hardness of mild steel is 70 HRB.
See lessWhat soil tests are done to decide whether to lay pile foundation? We have a construction site beside the canal. So we thought of laying pile foundation and soil is also black cotton soil. We want to construct 3 storey building.to ...
How to conduct a soundness tests on cement?
The cement considers unsound if it undergoes a large change in volume (expansion) that causes cracking of hardened cement paste when it is under the condition of restraint. Apparatus Required: Le-Chateliers Apparatus, Water bath, Vernier Caliper, Weighing Scale. Procedure : 1. Place the lightly oileRead more
The cement considers unsound if it undergoes a large change in volume (expansion) that causes cracking of hardened cement paste when it is under the condition of restraint.
Apparatus Required: Le-Chateliers Apparatus, Water bath, Vernier Caliper, Weighing Scale.
Procedure :
1. Place the lightly oiled mold on a lightly oiled glass sheet and fill it with cement paste formed by gauging cement with 0.78 times the water required to give a paste of standard consistency.
2. Cover the mold with another piece of lightly oiled glass sheet, place a small weight on this covering glass sheet and immediately submerge the whole assembly in water at a temperature of 27 ± 2°C and keep there for 24 hours.
3. Measure the distance separating the indicator points to the nearest 0.5 mm. Submerge the mold again in water at the temperature prescribed above.
4. Bring the water to boiling, with the mold kept submerged, in 25 to 30 minutes, and keep it boiling for three hours. Remove the mold from the water, allow it to cool, and measure the distance between the indicator points.
5. The difference between these two measurements indicates the expansion of the cement. This must not exceed 10 mm for ordinary, rapid hardening, and low heat Portland cements. If in case the expansion is more than 10 mm as tested above, the cement is said to be unsound.
Observation And Recording:
Soundness/expansion of cement = L1-L2
L1=Measurement taken after 24 hours of immersion in water at a temp. of 27 ± 20C
L2=Measurement taken after 3 hours of immersion in water at boiling temperature.
Calculate the mean of two values to the nearest 0.5 mm.
How the number of days of sampling is counted for concrete cores taken for compressive strength?
What are the types of cement mortar ratio?
Mortar mix ratio i.e. proportioning of cement sand in mortar provides consistency in the performance and appearance of masonry construction. Proper proportioning of mortar ingredients helps in having the following advantages: Uniformity of strength Uniform workability Uniform color Uniformity of proRead more
Mortar mix ratio i.e. proportioning of cement sand in mortar provides consistency in the performance and appearance of masonry construction. Proper proportioning of mortar ingredients helps in having the following advantages:
Mainly the proportioning of the cement and sand for mortar is conducted by volume proportioning compared to weight proportion.
The types of cement mortar are in detail explained in the article below-
Mortar Mix Ratio Proportioning for Masonry Construction
See lessHow to conduct acid-resistant tests on bricks?
The tests conducted for acid-resistant bricks are: Water absorption Flexural strength Compressive strength Acid resistance To know more about acid-resistant brick and the detailed test procedure, read the article given below- Acid-Resistant Bricks: Properties, Types, Tests, and Advantages
The tests conducted for acid-resistant bricks are:
To know more about acid-resistant brick and the detailed test procedure, read the article given below-
Acid-Resistant Bricks: Properties, Types, Tests, and Advantages
What are the tests conducted on fly ash before using it as a replacement for cement?
The test conducted on fly ash prior to being used as replacement for cement are- Fineness of Fly Ash Specific Gravity of Fly Ash Size and Shape of Fly Ash Colour To know more about the detail in types of fly ash, test, properties, and uses, click the links below- Fly Ash – Properties, Types, MechaniRead more
The test conducted on fly ash prior to being used as replacement for cement are-
To know more about the detail in types of fly ash, test, properties, and uses, click the links below-
Fly Ash – Properties, Types, Mechanism and Uses
Fly Ash – Properties, Types, Mechanism and Uses
Concrete without Cement – A Green Alternative Fly Ash
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Komal Bhandakkar
Purpose of California bearing ratio test: The main purpose of the California bearing ratio test is the measurement of a soil resistance penetration before reaching its highest ultimate value of a shearing Basically, 2 California bearing ratio value is designed as a ratio in % of range 0 to 100. TheRead more
Purpose of California bearing ratio test: