Recent content by shafi12344

Just perform core test As per ACI 85% of the design strength is enough to accept the structure .

Really appreciate for your advice and recommendation

All the details explanation are perfect . but in the case of subbase and base course material , some times compaction degree will get more than 100 %.

Guys anybody can recommend fire proofing material to be applied on concrete member which is wrapped with carbon fiber sheet. Could you recommend me suitable fire proofing material which can be applied on the surface of carbon fiber sheet and concrete? And That proofing material should be...

Workability of the concrete will be change according to the location where the concrete is poured or depends up on the structure for example if you poured the concrete in the slope, Low slump concrete will be used , if you poured concrete in a slab of a bridge (more than 1.5 m meter ) should use...

As Per BSEN ( BS ) for making 100 mm cube 3 layer 25 blows and 150 mm cube 3 layers 35 blows , Tamping rod using for making cube in this picture is wrong according to BSEN(BS)

If the Fineness modulus and specific gravity of the material comply the requirement we can use any material

It will be change according to the standard In ASTM standard Slump should measure from the center if you get shear sump retest again until True slump In BS we can measure slump ,which ever is the highest point

All the below NDT tests are applicable but if the strength test is failed coring is the better option to know the insitu compressive strength.

A lap is when two pieces of reinforcing bar (rebar) are overlapped to create a continuous line of rebar. The length of the lap varies depend on concrete strength, the rebar grade, size, and spacing. D is the diameter of the bars to be lapped together. So if you want to lap 20 mm dia column bars...

According to ASTM C 125 Aggregate predominantly retained on the 4.75-mm (No. 4) sieve or that portion of an aggregate retained on the 4.75-mm (No. 4) sieve

ASTM C33 is used for concrete aggregate not for m.Sand for M.Sand & N.Sand used for plastering ASTM C142 and ASTM C270-04

Specification ASTM C 142 Sieve Size (mm) 9.50 4.75 2.36 1.18 0.600 0.300 0.150 0.075 Natural Sand - 100 95 - 100 70 - 100 40 - 75 10 -35 2 -15 0 - 5 Manufactured Sand - 100 95 -100 70 - 100 40 - 75 20 - 40 10 - 25 0 - 10 If the material not comply this limits can use ASTM C270-04

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