The Modifying Additive for Concrete Compositions Based on the Oil Refinery Waste

Gnedash

2020

SSP

Heat-resistant properties of the cement stone are provided by both high-temperature filler and the modified matrix on the basis of the Portland cement. For production of heat-resistant compositions as high-temperature filler, it is offered to use the secondary and accompanying products of production of carbide of silicon (SiC) and production wastes of the abrasive tools on a ceramic base. Increase in heat-resistant properties of the Portland cement knitting substance is offered to be solved by introduction to the structure of a cement composition of single substituted orthophosphate of calcium. The choice as an additive to the Portland cement a single substituted orthophosphate of calcium (double superphosphate) is proved by questions of safety measures and ecology, when using ortho-phosphoric acid and its salts for giving to cement compositions heat-resistant properties. The multicomponent composition of fine-grained concrete makes it possible to operate effectively the processes of forming the structure of cement stone at all stages of the technology, and to obtain materials with the most diverse set of properties. An introduction to the structure of a composite of 5% of filler of cyclonic dust of carbide of silicon, and a replacement of quartz filler by waste of abrasive production gave the increase of the compressive strength at 12%, bending strength for 36%. The thermal firmness increased by 3 times. An introduction to the structure of heat-resistant composition of single substituted orthophosphate of calcium (double superphosphate) in a number of 0.2% of the mass of cement allowed to increase the thermal firmness of structures to 20 heat exchanges (water, 800 oС).

Section: Relevance and Scientific Merit Of The Subjectmentioning

confidence: 99%

“…Compounds with high-temperature aggregates, including industrial waste (chromite, forsterite, magnesite, corundum, etc.) are most widely used in heat-resistant concrete from Portland cement [6][7][8]11].…”

Section: Research Objective and Theoretical Partmentioning

confidence: 99%

Heat-Resistant Composite Materials Based on Secondary Material Resources

Gnedash

2020

SSP

“…Acrylic polymer additive characterized as a hydrophobic plasticizing modifier containing a microfill pigment and mineral supplement will have a positive effect on improving the corrosion resistance of concrete. That will make it possible to use the modified formulations in the field of hydraulic structures [15,19].…”

Section: The Practical Significance Suggestions and Implementation Re...mentioning

confidence: 99%

Expansion of Concrete Functionality due to Use of New Hydrophobic Additives

Cherednichenko

2017

SSP

Self Cite

The lack of free areas in urban infrastructure development in the historically formed housing development in large cities and megacities promotes the growth of volumes of the realizable objects of underground construction. The design, installation, as well as quality control of waterproofing works in this case are crucial and significant stage in the construction of underground and hydraulic structures. A comprehensive approach to the analysis of the situation contributes to the selection of the correct strategy for the work execution and suitable material for waterproofing of building structures. Primary concrete protection requires the development of new effective polymer waterproofing materials. The acrylic polymer addition in concrete composition promotes corrosion resistance by 13%. Due to the composite modification penetration of corrosive medium decreased by 80%. The effectiveness of concrete modification by polymer acrylic additives is evident. This modified concrete is one of the most popular materials in the construction industry. By this criterion technology becomes progressive.

Fine Chemical Engineering

“…The study supported lowering the unit cost, limiting waste generation and reusing the same in an eco-friendly way. 5 The catalysts from the fluid catalytic cracking unit are mixed with cement to enhance the compressive strength of concrete and the study indicates a rise in compressive strength. 6 A number of studies have been carried out to enhance the properties of self-compacting concrete using varieties of fly ash, slag, and fumed silica coupled with recycled course aggregates.…”

Section: Introductionmentioning

confidence: 99%

Production of Plastic Cement Concrete from PVC Waste

Kindi¹,

Devi²,

Abri

et al. 2021

The disposal of plastic wastes into the environment is a serious concern due to its limited biodegradability and production in excess quantity. The accumulation of enormous volumes of plastic waste is considered to be a major pollution problem and it is essential to find an alternate method to address such issues in an environmental-friendly and cost-effective way. The current research focused on the production of plastic cement concrete from waste polyvinyl chloride (PVC) generated from a polymer processing industry in varying proportions, and to modify the concrete properties. Polyvinyl chloride was partially replaced with Ordinary Portland Cement (OPC) by varying its compositions from 15% to 35% by weight (i.e. 15%, 20%, 25%, 30% and 35% OPC). The curing period was kept for 7 days after casting process. The produced plastic cement concrete was tested for compressive strength through Universal Testing Machine (UTM). Density and water absorption tests were also carried out on hardened concrete to assess the application of plastic cement concrete as a building material. The other characterization techniques employed are Fourier Transform Infrared Spectroscopy (FTIR) and X-Ray Diffraction (XRD) analyses. It was observed that up to 15% by weight of polyvinyl chloride could be replaced with OPC which exhibited higher compressive strength (19.25 MPa) compared to other mix proportions. A maximum density of 2.051 g/cm3 was obtained at a concrete mix composition corresponding to 25% replacement. The maximum water absorption percentage (5.86%) was observed at 35% plastic waste replacement. The studies demonstrate that the waste plastic material is considered to be a cost-effective, viable and sustainable way of reducing the environmental pollution.