Engineering properties and durability of cement mortar with environmental cement and waste liquid crystal glass

Abstract

Carbon reduction and mitigating climate change. The recycling of industrial wastes has not only reduced resource expenditures but also reduced greenhouse gas emissions to build a sustainable resource society. Environmental cement was combined with stainless steel reduced slag (SSRS), ground-granulated blast-furnace slag (GGBFS), and fly ash. The cement mortar was prepared to allow discussion of the fresh properties, and the hardened properties and durability at curing ages of 3, 7, 28, 56, and 91 days.Research shows that the slump and slump flow increased when the SSRS and waste liquid crystal glass sand substitution amounts increased, and the SSRS and waste liquid crystal glass sand substitution amounts increased with the W/B ratio. However, among various mix proportions, when the waste liquid crystal glass sand substitution amount was 10 %, the waste liquid crystal glass filled the pores of natural river sand for lower specific gravity than the general natural river sand, leading to better-hardened properties and durability. When the waste liquid crystal glass sand substitution amount exceeded 10 %, the strength decreased. In terms of durability, the resistivity decreased as the SSRS substitution amount increased, and the resistivity of various mix proportions was higher than 20 kΩ-cm after the age of 7 days; the glass sand substitution amount of 10 % showed better performance for sulfate attack, and the durability was enhanced. Meanwhile, 10 % glass sand and stainless steel reduced ballast replace the 5 % cement, which can improve the durability of cement mortar and achieve the effect of energy saving and carbon reduction.