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Acid Test:
This test is usually carried out on sand stones to examine the presence of calcium carbonate that weakens the weather resisting quality. In this particular test, a sample of stone weighing approximate 50 to 100 gm is taken and kept in a solution of 1% hydrochloric acid for 7 days. The solution is agitated at intervals. A fine building stone maintains its sharp edges and keeps its surface intact. If edges are broken & powder is formed on the surface, it shows the presence of calcium carbonate. Such type of stones will have poor weather resistance.
Sieve Analysis - Soil Mechanics and Foundations a. Sieve Analysis used to obtain the grain size distribution of coarse-grained soils (sands and gravels) larger than 0.075 mm (r
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Why IRC 37-2012 has taken 90th percentile for pavement design of expressway or NH while they hav taken 80th percentile for state highway design ????????
Uses of Lime Uses of lime in civil works are following : For making mortar for masonry works and plastering For white washing. For soil stabilization. To produc
Q. What is Shock transmission unit in bridges? Shock transmission unit is fundamentally a device connecting separate structural units. It's characterized by its ability to tran
What is Thermo-electric prestressing We know that, stretched tendons are used in prestressed concrete. Stretching of tendons may be accomplished by using jacks or by other mea
A raft of size 4 m × 4 m carries a uniform load of 200 kN/m 2 . Using the point load approximation with four equivalent point loads, measure the stress increment at a point in the
Prestressed concrete poles In the past decades, prestressed concrete poles have become popular and have replaced the traditional poles made of timber, steel or reinforced con
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