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[bigsmile]Hi all, Looking for some advice for concrete aggregate testing. If I have a rock that will potentially be quarried and crushed for use as aggregate in concrete how should this be tested in accordance with BS882? I'm confused as the tests in BS882 mainly refer to tests on the...

Evening all :) Wondering if someone can help shed some light on describing coarse grained glacial material in accordance with BS5930. The material has 40% sand, 40% gravel, 17% silt and 3% clay. By my understanding the is classed as a coarse material (less than 35% fine fraction) and would be...

Thanks moe333 :) So basically it is governed by effective stress and the fact that you consolidate the material in a CU test but not in a UU test.

First post and hopefully someone can help! I'm really struggling to understand WHY UU and CU tests show different results. The main thing I can't get my head around is why the UU test produces a flat line (ie no phi value) while the CU value produces a phi value. In both tests the samples...