Ảnh hưởng hàm lượng phụ gia gốc xi măng đến khả năng kháng nước của vữa xi măng-cát dùng xây tô

Abstract

Worldwide, research on waterproofing additives has been conducted quite early, as the construction industry developed in parallel with the need to protect structures from the effects of water. Consequently, research on additives has been increasingly intensified and applied with many new technologies. Similarly, in Vietnam, research on waterproofing additives has also been deployed, especially in the context of the characteristic tropical monsoon climate, which causes many problems with water penetration in buildings. Therefore, the authors conducted a study to evaluate the effect of waterproofing additive content on the waterproofing ability of cement-sand mortar. Mortar samples were mixed with different additive contents ranging from 0-20% and tested for water permeability and compressive strength. According to the results, increasing the additive content helps to increase strength and significantly improve the waterproofing ability of the mortar. However, when the content exceeds 10%, the waterproofing ability decreases rapidly and is even lower than the 0% sample. Thus, this study provides useful information for selecting the optimal waterproofing additive content in the production of cement-sand mortar in construction.