Tell you the efficiency of early-strength water-reducing agent from the specifications and indicators

Strictly speaking, only early-strength high-performance water-reducing agents, or high-performance water-reducing agents, or certain high-performance water-reducing agents can be considered high-performance water-reducing agents

On the contrary, if They are called early-strength high-efficiency water-reducing admixtures, early-strength pumping agents, early-strength retarding water-reducing admixtures, etc. The requirements for high-efficiency water-reducing admixtures, pumping agents, and retarding water-reducing admixtures in GB8076-2008 should be followed respectively. standard.

People who make water-reducing admixtures are not stupid, and they will not let others catch such a handle. Do the admixtures for ordinary commercial merchants with C15 need to have a water-reducing rate of more than 25%? A water reduction rate of about 18 is enough, but it is indeed an early-strength type

The homogeneity index of early-strength high-performance water-reducing agent

Test project index

[1] The solid content of liquid early-strength high-performance water-reducing admixture: when S ≥ 20%, 0.95 S ≤ X<1.05 When SS<20%, 0.90 S ≤

【2】 The moisture content of solid early-strength high-performance water-reducing admixture: when W ≥ 5%, 0.90 W ≤ X ＜ 1.10WW ＜ 5%, 0.80 W ≤ >【3】The fineness of the solid early-strength high-performance water-reducing agent should be less than 15% on a 0.3mm sieve

【4】The pH value should be within ± 1.0 of the manufacturer's control value

【5】 Density is a high-performance water-reducing agent for liquid early strength. The fluctuation range of density test value should be controlled within ± 0.01g/ml

【6】 Cement slurry The fluidity should not be less than 95% of the value controlled by the manufacturer

[7] The water reduction rate of mortar should not be less than 95% of the value controlled by the manufacturer

Note: 1) S is production The solid content (mass percentage) provided by the factory, X is the tested solid content (mass percentage).

2) w is the moisture content (mass percentage) provided by the manufacturer, and X is the tested moisture content (mass percentage).

3) Choose one of cement slurry fluidity and mortar water reduction rate. </p