Limestone filler as one of the cheapest and best additive to concrete

21st International Scientific Conference on Advanced in Civil Engineering "Construction - The Formation of Living Environment"

土木建筑工程

Belov, Vladimir^1 ; Kuliaev, Pavel^1

Tver State Technical University, Tver, Russia^1

关键词: Admixture composition;    Crack resistance;    Creep deformations;    Fine-grained carbonates;    Limestone filler;    Stress-strain distributions;    Superplasticizers;    Synergetic effect;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/365/3/032054/pdf
DOI  :  10.1088/1757-899X/365/3/032054

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

The purpose of obtaining effective building materials of high-density and high-durability is coupled with the development of implementation of different test-proven methods of modification of such materials on different levels, micro- and nanostructural included. Of late, of much significance is the application of finely-disperse ingredients in admixture compositions such as limestone filler produced from local raw resources and is considered to be one of the cheapest and best mechanical properties modifier, chemically and electrically relatively almost neutral. An efficiency of limestone filler to fine-grained carbonate concrete (FGCC) is proven in tests data obtained. Limestone filler in combination with superplasticizer enhances crack-resistance and reduces creep deformations thereby making FGCC the most effective and utilized. Besides, knowledge of the stress-strain distribution in concrete with limestone fine-grained additives under compression is crucial for the design of certain kinds of reinforced concrete structures, such as shells, membranes and domes. The latter preferably should be manufactured with addition of both limestone filler and superplasticizer which reveals synergetic effect and leads to narrowing boundaries of crack initiating stresses and strength in compression. An additional study must be performed as to replace superplasticizer with more progressive hyperplasticizer.