graduate student
Moscow, Moscow, Russian Federation
employee
Moscow, Moscow, Russian Federation
UDC 666.972.165
CSCSTI 67.15
Russian Classification of Professions by Education 18.06.01
Russian Library and Bibliographic Classification 383
Russian Trade and Bibliographic Classification 5415
The article studies the effect of two modifier admixtures with different chemical compositions (SE-75 based on a compo-sition of isopropanolamines and carbohydrates, and SE-25 based on a composition of alkanolamines and carbohydrates) on the properties of concrete based on different cements. It was found that the chemical additives have different effects on the strength properties of concrete, depending on the type of binder used. The addition of SE-75 and SE-25 improves the durability of the concrete mixture without compromising its strength in the early stages of hardening. It has been established that replacing part of the cement with an active mineral additive, as well as using a modifier, significantly increases the strength characteristics of concrete compared to those based on pure cement. It has been found that using additives at a dosage of 0.3-0.5% increases compressive strength at 28 days by up to 20%. An alternative approach is to reduce the amount of cement in the concrete by 10% without compromising the performance.
cement, concrete mix, strength, modifier admixtures, hydration, dissolution, characteristics
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