1. test raw materials and test methods
1.1 raw materials
Cement(28d strength 54.2 mpa),Fly ash,Mineral power,Coarse aggregate(5-31.5mm gravel),fine aggregate: manufactured sand, fineness modulus 2.8, HPMC: viscosity: 30000(MK20M), 100000(MK50M), 200000(MK70M) (here after expressed as hpmc-3w, hpmc-10w, hpmc-20w); Additive: polycarboxylate superplasticizer.
1.2 test method
The test is carried out according to the relevant provisions of test method for performance of ordinary concrete mixture (GB / T50080-2016), mechanical test method for ordinary concrete (GB / T50081-2002) and standard for test method for basic performance of building mortar (JGJ / T70-2009). In the water retention test, 2.36mm square hole sieve is used to screen out the particles larger than 2.36mm.
1.3 test mix proportion (see Table 1)
Table 1 Raw materials and mix proportion of concrete kg.m-3