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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.
Explain the shrinkage strain of concrete Shrinkage of concrete depends only on the interval of time and the moisture conditions, but is independent of the stresses in the membe
I am a Civil Engg student. Why CBR Values determined only at 2.5 and 5 mm penetration ?.
stress
Q. Sand cone test – suitable for all soils? Sand cone (replacement) test is generally carried out to determine the in-situ and compacted density of soils. This testing method i
Question While selection of waterstop, shall engineers use plain dumb-bell type , center-bulb sort ? Answer Plain dumb-bell kind is used for joint site where sm
A hydro stressor consists essentially of a hydraulic pump which transmits its force through connecting vans to clamps which grips the rail. In case of mechanical tensor the force i
Non-carbonate hardness (NCH) - Water Softening 1. Permanent Hardness, not removed by heating water 2. Ca +2 , Mg +2 combining with ions outside of alkalinity such as Cl -1
Minimum volume of sump volume for pumps Maximum pumping rate = Q P Volume of sump = V Inflow Rate = Q i Cycle Time T c = t 1 + t 2 t 1 = V / Q P - Q i t 2
Are diaphragms necessary in designing of concrete box girder bridges ?
What is moisture content for road work
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