Lightweight concrete for frame-monolithic construction

Abstract

The proposed article is devoted to the study of the properties (strength, impact strength, sound absorption) of lightweight concrete used for frame-monolithic construction. Characterized by the well-known advantages (reduced load on the foundation, reduced consumption of reinforcement, as well as improved heat and sound isolation), lightweight concrete requires additional technological methods to achieve the necessary mechanical characteristics - compressive strength and impact strength. An alternative to the traditional preparation of concrete mixtures is proposed a technology using a high-speed mixer-activator in the presence of ground chamot, superplasticizer C-3 with the introduction of hydrophobic expanded clay gravel up to 75% of the amount of granite crushed stone. The use of mechanical activation leads to an increase in impact strength by 44% compared to the control, and makes it possible to obtain concretes, the sound isolation level of which provides the maximum efficiency of impact noise isolation and is equal to 45.7 - 42.8 dB in three frequencies, and the sound absorption level is 39. 8 - 49.7 dB.