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Research of properties of Portland cement in the joint application of microsilica and hyperplasticizer EthacrylТМ HF

UDK: 691.542

A.V. Voronova, E.A. Ashpalatova, V.M. Sultanova

It has been studied the influence of plasticizer based on polycarboxylate ether with a finely dispersed additive of technogenic character on the physical and technical properties of cement composite. The introduction of microsilica reduces the fluidity of the cement mixture, so it is advisable to use it in combination with the hyperplasticizing agent Ethacryl HF, which reduces the water requirement of the binder. Also, the stabilized aqueous suspensions of microsilica were obtained experimentally and their sedimentation properties were noted. Analysis of the results of mechanical tests for 7 days showed that the introduction of a complex of additives based on a polycarboxylate plasticizer and microsilica into cement binders in an amount of 0.05 and 5 %, as well as 0.9 and 30 %, respectively, increases the compressive strength by 31 %. The use of modifying additives promotes to reduce the water-binding ratio, intensify the hydration process and harden the cement composite. This leads to the formation of a dense and durable cement stone.

Файл: Воронова.pdf, 6 pag.

Рубрика: Строительные материалы и технологии их производства
Выпуск №8: По материалам IX Всероссийской молодежной конференции аспирантов, молодых ученых и студентов «СОВРЕМЕННЫЕ ТЕХНОЛОГИИ В СТРОИТЕЛЬСТВЕ. ТЕОРИЯ И ПРАКТИКА», (Часть I ,июнь, 2017)


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