Low-carbon high-performance concrete supplementary cementitious material
A technology of auxiliary cementitious materials and high-performance concrete, which is applied in the field of low-carbon high-performance concrete auxiliary cementitious materials, can solve the problems of lack of means to control the water-binder ratio, reduced compressive and flexural properties, and early strength decline. Good energy saving and emission reduction benefits, inhibition of AAR reaction, and improvement of durability indicators
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[0017] The present invention is further described below.
[0018] Prepared in parts by weight, the admixture is composed of 20-70 parts of slag powder, 20-70 parts of fly ash, 5-10 parts of silica fume, 3-10 parts of desulfurized gypsum, and 1-3 parts of water reducing agent; among them, Slag powder, fly ash, silica fume, and desulfurized gypsum are micro-aggregates with a particle size of 100 nanometers to 100 microns, and the materials are placed in the mixer in sequence, at normal temperature and pressure, at 60-120 rpm Stir at a high speed for 60-120 minutes to obtain auxiliary gelling material.
[0019] In the above, silica fume is nano-scale, and its active component is mainly SiO 2 , which is formed by the reduction reaction of high-purity quartz and coke in the electric arc furnace during smelting through chemical and physical modification, forming a nano-scale active mineral component with an average particle size of 0.1-0.2um. Nano-scale silica fume is 1 / 100-1 / 50 o...
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