Theoretical principles of creation of cellular concrete with the use of secondary raw materials and dispersed reinforcement

Eugene Pyataev,Alexey Poserenin,Elizaveta Mednikova,Marina Burtseva,Andrey Medvedev,Vitaly Mukhametzyanov,A Volkov,A Adamtsevich,A Pustovgar

doi:10.1051/matecconf/201825101012

Abstract

The article outlines and substantiates the theoretical principles of the creation of cellular concrete reinforced with mineral fiber with the use of secondary products of housing renovation. The advantages provided by the dispersive reinforcement are the reduction in the economic costs of the construction of facilities, ensuring their reliable and durable operation. In this case, an important contribution is the alkali resistance of mineral fibers, the evaluation of which was carried out using the technique of an elemental composition based on the use of a spectrometer. On an example of research of technology of cellular concrete reinforced with alkali-resistant mineral fiber; Methods for evaluating the importance of factors characterizing technological processes, constructing polynomials of nonlinear regression, analytical optimization, selection of composition and evaluation of characteristics of raw components were tested. Reinforced with mineral fiber constructions can be built on weak grounds and effectively solve the problems of saving energy and raw materials.

Highlights

The aim of improving heat-insulating cellular concrete technology is to obtain products with average density of 100-200 kg/m3, compressive strength of 0,4-0,6 MPa and heat conductivity of 0,05-0,06W/(m·K) in under factory conditions
An average density of a products can be reduced by forming a high strength selicate stone and creation pore space structure characterized by uniform pore distribution
The main advantages of using mineral alkali-resistant fiber for concrete and cellular concrete blocks are that even a small addition of these fibers can increase the resistance of structures to flexure loads

Summary

Introduction

The aim of improving heat-insulating cellular concrete technology is to obtain products with average density of 100-200 kg/m3, compressive strength of 0,4-0,6 MPa and heat conductivity of 0,05-0,06W/(m·K) in under factory conditions. An average density of a products can be reduced by forming a high strength selicate stone and creation pore space structure characterized by uniform pore distribution. Dispersed reinforcement) using polypropylene, glass, basalt and metal fibers (Fig.1) These methods allow setting up complex constructions and solve the problem of low durability of the products. The products reinforced with polypropylene fibers are characterized by significant deformations even at low tensile loads, which is explained by the low adhesion of polypropylene in the cement matrix Such products lose their strength properties over time, have a high abradability of the surface and combustibility when an open flame affects fiber. The concrete products reinforced with basalt fiber are characterized by increased durability, significant compressive strength, frost resistance, etc. One of the factors of high resistance of mineral fibers is their elemental composition, and the content of heavy metals in particular

Experimental

Results & Discussion

Conclusions