Slag-silicate cement containing steel dregs less than 8 mm in diameter and its preparing process

Abstract

A slag silicate cement containg steel slag with diameter less than 8 mm features that said steel steel slags is directly used without grinding and an activator is used to activate the water-hardeninggelatin in the steel slags to promote the expandable substance to be released earlier. Its advantages are less consumption of clinker, low grinding load and high antiflex cracking strength.

Description

Technical field: [0001] The invention relates to a hydraulic cementitious material, more specifically to slag portland cement containing steel slag with a diameter less than 8 mm, and also relates to a preparation method of the cement. Background technique: [0002] The existing steel slag slag portland cement with the label of 325 generally has a weight ratio of various raw materials: Portland cement clinker 35%, steel slag 28%, slag 32%, and gypsum 5%. [0003] The existing steel slag slag portland cement with the label of 425 generally has the weight ratio of various raw materials: Portland cement clinker 50%, steel slag 20%, slag 25%, and gypsum 5%. [0004] It can be seen from the above that in the prior art, with the increase of the cement grade, that is, the cement strength grade, the usage amount of silicate clinker is significantly increased, while the addition amount of steel slag and slag is significantly reduced. [0005] In addition, in the preparation of the e...

AI Technical Summary

Problems solved by technology

[0005] In addition, the preparation of the existing slag portland cement must grind all raw materials, and its fineness needs to be tested by 80 micron sieve analysis method