A NEW TECHNOLOGY FOR MANUFACTURING POLYMER-CEMENT COMPOSITION FROM LIMESTONE-SHELL MINING WASTE


Bukayev Y.Z. Mutalibova G.K. Bukayeva A.Z.
MARCH – APRIL 2022National Academy of Sciences of the Republic of Kazakhstan

News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2022#2Issue 45273 - 88 pp.

This article describes the research of processes and technologies for the manufacture of new building materials from the waste of limestone wall stone extraction. The analysis of the current state of the problem of extraction of wall stone from limestone-shell fields located in the western part of Kazakhstan is carried out. Site No. 3 of the Zhetybai limestone-shell field has been identified as an experimental testing ground for research and the creation of a new type of building material based on a polymer-cement composition of limestone-shell and additional ingredients of mineral additives. The rational chemical and mineralogical composition of the limestone-shell sample of Area No. 3 at the Zhetybai field, suitable for obtaining new construction materials with high-performance characteristics, has been experimentally established. Based on physicochemical studies, it has been established that this limestone-shell material is suitable for the production of portland cement, lime, etc. materials. A polymer-cement composition has been developed for the manufacture of building material from limestone-shell mining waste from the Zhetybai field in the Mangystau region. The established solution of the polymer – cement composition for the manufacture of building material has the following component ratios: white cement (portland cement or decorative cement)-7-8%, filler (limestone–shell waste) – 68-73%, aqueous polymer solution (0.15% polyacrylamide solution)-15-18%, white spirit – 0.5-1.0%, hardening accelerator (duralumin solution in hydrochloric acid, in a ratio of 1:10, diluted with water to 1% concentration) – 0.7-1.2%. On the basis of the conducted research, highly efficient technology has been developed, using a cheaper filler, which opens up new opportunities for quarries for the extraction of minerals in the sale of limestone-shell waste accumulated in large quantities, as well as reducing waste dumps of quarry farms. The proposed building material provides the workability and mobility of the mixture, an increase in strength and water permeability, with significantly lower consumption of cement (2 times), polymer (3 times), allowing a rational use of quarry waste. In all the considered developments, a flexible and more economical solution was required when experimenting with polymer additives and limestone waste of low strength, one of these is the production of a polymer-cement composition. Therefore, the development of a method for obtaining building materials based on limestone-shell waste has no world analogs.

build stone , experimental landfill , limestone-shell , physical and chemical research , plasticizer , polymer-cement composition , waste

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Yessenov University, Aktau, Kazakhstan
Russian State Agrarian University, Moscow Timiryazev Agricultural Academy, Moscow, Russian Federation

Yessenov University
Russian State Agrarian University

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