Production of Greener High-Strength Concrete Using Russian Quartz Sandstone Mine Waste Aggregates

Quartz sandstone (QS) is a mine waste; therefore, its use in construction allows for both reducing the cost of the concrete and contributing to the utilization of waste. The scientific originality of this study is the identification of models of the effect of QS aggregate on the physicomechanical, durability characteristics, and eco-safety of greener high-strength concrete. The study used an energy-efficient method of non-thermal effects of electromagnetic pulses on the destruction mechanisms of quartz-containing raw materials. The characteristics of quartzite sandstone aggregates, including the natural activity of radionuclides, were comprehensively studied. The features of concrete hardening, including the formation of an interfacial transition zone between the aggregate and the cement matrix, were studied, taking into account the chemical and morphological features of quartzite sandstone. In addition, the microstructural and morphological properties of concrete were determined after a 28 day curing. In this study, the behaviors of the concrete with QS aggregate were investigated, bearing in mind the provisions of geomimetics science on the affinity of structures. The results obtained showed that the QS aggregate had the activity of natural radionuclides 3–4 times lower compared to traditional aggregates. Efficient greener concrete with a 46.3 MPa compressive strength, water permeability grade W14, and freeze–thaw resistance of 300 cycles were also obtained, demonstrating that the performance of this greener concrete was comparable to that of traditional concrete with more expensive granite or gabbro diabase aggregates.

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A NEW KIND OF CEMENT AS A SOLUTION TO THE ENVIRONMENTAL CHALLENGES OF MODERNITY

Конференции ◽

10.47100/conferences.v1i1.356 ◽

2021 ◽

Author(s):

G Kasimova

Keyword(s):

Fly Ash ◽

High Strength Concrete ◽

Fresh Concrete ◽

Raw Materials ◽

Road Construction ◽

High Strength ◽

Strength Concrete ◽

Cement Replacement ◽

Air Content ◽

Concrete Mix

The article presents studies on the production of high-strength concrete for road construction for a given 28-day strength on local raw materials. As a cement-replacement additive, fly ash was used. It was found out that the fresh concrete mixture had adequate workability, the air content of the concrete mix withthe sperplastifizer, the 28-day strength of the base mixture, which corresponded to the required strength.

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LIGHTER HIGH STRENGTH CONCRETE BEAM

Scientific Journal of Applied Sciences of Sabratha University ◽

10.47891/sabujas.v2i2.17-26 ◽

2019 ◽

Vol 2 (2) ◽

pp. 17-26

Author(s):

Nuri Mohamed Elbasha

Keyword(s):

High Strength Concrete ◽

Construction Projects ◽

High Strength ◽

Reinforced Concrete Beams ◽

Limited Information ◽

Experimental Proof ◽

Strength Concrete ◽

Project Costs ◽

Normal Strength ◽

The Cost

High strength concrete (HSC) has been used extensively in civil construction projects worldwide because it reduces the cross section and the weight of long construction members. In recent years a marked increase in the use of High Strength Concrete (HSC) has been evident in Australian building construction despite the fact that the current Australian design standard provides no design rules for such a material. Very limited information on the properties of HSC and its design and construction processes are available in Australia, although in recent times many studies have been undertaken to produce material and, more importantly, to determine its characteristic. In the last 20 years there has been extensive research to economically utilize new components to improve the quality of HSC. HSC produces smaller but stronger structural elements with large spaces available. It has been studied that the cost of using HSC instead of Normal Strength Concerete (NSC) in different types of constructions. This proved that structures constructed with HSC are lighter and economical compared with those constructed with NSC. In the long term durability significantly affects project costs. In other words after several years a concrete structure needs rehabilitation or in critical cases must be demolished, therefore the price of a project consists of initial costs plus those covering any rehabilitation. A huge amount of money could be saved by utilizing the durability characteristics of high strength concrete. This study presents recent information and the benefits of high strength concrete. Also, provides in brief an experimental proof that installing a helix with a suitable pitch and diameter in the compression zone of beams significantly enhances their strength and ductility. Therefore, designers could confidently use high-strength concrete and helical confinement to design long and light reinforced concrete beams.

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Experimental Study of High Strength Concrete By Alccofine and Bagasse Ash

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/889/1/012058 ◽

2021 ◽

Vol 889 (1) ◽

pp. 012058

Author(s):

Harshdeep Vani ◽

Kaamun ◽

Sahil Arora

Keyword(s):

Experimental Study ◽

Prestressed Concrete ◽

High Strength Concrete ◽

Nuclear Power ◽

Cement Content ◽

High Strength ◽

Heat Of Hydration ◽

Fine Aggregate ◽

Strength Concrete ◽

The Cost

Abstract The use of concrete is increasing day to day very rapidly. The lesser the cross-section higher will be the grade of concrete. High-grade concrete is generally used in the nuclear power plant or precast prestressed concrete. The higher the cement content high will be the occurrence of the defect due to heat of hydration in the concrete. This paper deals with the experimental study of high-strength concrete which can be prepared by using the cement content less than the required quantity by using any other supplementary material. Like Alccofine and bagasse ash. Alccofine is costlier than cement which increases the cost of concrete to adjust that cost of concrete the bagasse ash is been used in the place of fine aggregate.

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Experimental Study on Rebound Curve of High-Strength Concrete

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.881.137 ◽

2021 ◽

Vol 881 ◽

pp. 137-141

Author(s):

Cao Li ◽

Wang Qing Gao

Keyword(s):

High Strength Concrete ◽

Raw Materials ◽

Engineering Application ◽

Basic Research ◽

High Strength ◽

Detection Accuracy ◽

Concrete Technology ◽

Strength Concrete ◽

Strength Curve ◽

Important Basis

As the application of high-strength concrete in civil engineering becomes more and more extensive in our country, it needs to cooperate with the popularization and application of new high-strength concrete technology so as to solve the practical problems of high-strength concrete in the engineering application of the strength detection and master the national strength measurement curve of high-strength concrete. A representative commercial concrete manufacturer in Guangzhou was selected for the detection accuracy of this area. And the general raw materials in Guangzhou were used to make concrete specimens. The 4.5J high-strength rebound tester and 5.5J high-strength rebound tester were used for testing the rebound value of the specimen and the compressive strength of the specimen at different ages. The basic research results can be used as an important basis for establishing the strength curve of high-strength concrete areas.

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FINE-GRAINED HIGH-STRENGTH CONCRETE

Construction Materials and Products ◽

10.34031/2618-7183-2020-3-1-39-43 ◽

2020 ◽

Vol 3 (1) ◽

pp. 39-43 ◽

Cited By ~ 5

Author(s):

A. Tolstoy

Keyword(s):

Structure Formation ◽

Mineral Composition ◽

Production Technology ◽

High Strength Concrete ◽

Raw Materials ◽

Stable State ◽

High Strength ◽

Economic Feasibility ◽

Strength Concrete ◽

Fine Grained

the article discusses the possibilities of improving the strength characteristics of fine-grained concrete. Modification of compositions and production technology of fine-grained high-strength concrete is possible with the use of natural and man-made raw materials of various chemical and mineral composition. It is shown that it is possible to increase the economic feasibility of high-strength fine-grained concretes with the preservation of performance characteristics due to the use of man-made raw materials and production waste. The issues of controlling the processes of structure formation and identifying a potentially stable state of hardening compositions are considered, possibly on the basis of modification and design methods for the composition of construction objects with improved properties.

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Optimum Sustainable Mix Proportions of High Strength Concrete by Using Taguchi Method

Frattura ed Integrità Strutturale ◽

10.3221/igf-esis.54.16 ◽

2020 ◽

Vol 14 (54) ◽

pp. 211-225

Author(s):

M.A. Warda ◽

H.S. Khalil ◽

Seleem Ahmad ◽

I.M. Mahdi

Keyword(s):

Fly Ash ◽

High Strength Concrete ◽

Design Methodology ◽

Steel Fiber ◽

Raw Materials ◽

Aggregate Size ◽

High Strength ◽

Maximum Aggregate Size ◽

Strength Concrete ◽

Technical Requirements

In this study, mix proportion parameters of high strength concrete (HSC) were analyzed by using the Taguchi’s experiment design methodology for optimal design. For that purpose, mixtures are designed in a L27 orthogonal array with six factors, namely, ‘Silica Fume’, ‘Steel Fiber’, ‘Super-Plasticizer’, ‘Maximum Aggregate Size (AG)’, ‘Water / cementitious material (W/C) ratio’, ‘Fly Ash’. The mixtures were extensively tested to meet technical requirements of HSC. The experimental results were analyzed by using the Taguchi experimental design methodology. The best possible levels for mix proportions were determined for maximization of compressive strength at 7, 28, 56, 90 days, splitting tensile strength at 28 days, flexural strength at 28 days, and the slump. Also the best possible levels for mix proportions were determined for minimization of the production cost. It was found that steel fibers and fly ash are the most dominant factors in the process of optimization. The advantage of using steel fiber and fly ash was the reduced energy and cost associated with the raw materials which meant more sustainable concrete could be attained. It was also found that there is a necessity to apply a multi- response optimization to get the best mix proportions.

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DEVELOPMENT OF COMPOSITIONS OF FILLED INSULATORS BASED ON SECONDARY RAW FOR MONOLITHIC HIGH-STRENGTH CONCRETE

Herald of Dagestan State Technical University Technical Sciences ◽

10.21822/2073-6185-2019-46-3-129-138 ◽

2019 ◽

Vol 46 (3) ◽

pp. 129-138

Author(s):

A. Kh. Alaskhanov ◽

T. S. Murtazaeva ◽

M. S.-A. Saidumov ◽

A. O. Omarov

Keyword(s):

Structure Formation ◽

High Strength Concrete ◽

Raw Materials ◽

High Strength ◽

Recycled Materials ◽

Strength Concrete ◽

Regulatory Documents ◽

Concrete Mixtures ◽

Technogenic Raw Materials ◽

Mineral Fillers

Objectives Development of compositions filled with binders based on recycled materials for monolithic high-strength concrete.Method The research methods adopted in the work are based on the theoretical principles and laws of designing and optimizing polydisperse multicomponent systems, the phase and structure formation of clinker minerals, the logic of mathematical calculations, the technological features of the structure formation of composite masses, the theoretical principles of controlling the rheological processes of mixes. All experimental data presented in the work were obtained according to the methods of current regulatory documents (GOST, recommendations, etc.).Result The paper provides an analysis of the experience of using recycled materials in the form of products of demolition of buildings and structures, the technology for producing secondary raw materials for concrete on their basis. Formulations filled with binders with an activity of 60-71 MPa with finely dispersed mineral fillers from concrete scrap and brick combat with a ratio of 70:30%, respectively, were developed and investigated.Conclusion The optimal formulations of highly mobile concrete mixtures were designed using local natural and technogenic raw materials with a grade of P5 cone sediment and persistence for more than 8 hours to obtain high-strength classes of compressive strength up to B60-B80 with unique operational properties.

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Experimental study and modeling of the mechanical behavior of recycled aggregates-based high-strength concrete

Frattura ed Integrità Strutturale ◽

10.3221/igf-esis.56.17 ◽

2021 ◽

Vol 15 (56) ◽

pp. 203-216

Author(s):

Kheira Camellia Nehar ◽

Dalila Benamara

Keyword(s):

Sustainable Development ◽

High Strength Concrete ◽

High Efficiency ◽

Raw Materials ◽

High Strength ◽

Recycled Aggregates ◽

Concrete Aggregates ◽

Strength Concrete ◽

Construction And Demolition Wastes ◽

Natural Aggregates

Concrete, a material of prime importance, is widely used in various works. Among the raw materials composing concrete, aggregates come first. It is widely acknowledged that the consumption of natural aggregates increases with the growth in the amount of concrete needed. It has recently emerged that concrete waste can be recycled and reused in civil engineering works after a series of treatments. Moreover, in order to protect the environment and based on the principles of sustainable development, it was considered urgent to produce a High Strength Concrete incorporating recycled materials in addition to silica fume and a high-efficiency superplasticizer. This would certainly help to establish a harmonious sustainable development that guaranties the ecological balance and environmental protection, and prevents the depletion of natural resources. This study is part of a larger research program that that seeks to recover, recycle and valorize construction and demolition wastes. The main objective sought in this article is firstly to use aggregates from demolition concrete in the manufacture of a new concrete with high mechanical and rheological performance, and secondly, to model the behavior of this type of concrete using the Finite Element Method. This modeling aims to evaluate the maximum compressive strengths and compare them with those obtained experimentally.

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Powder concretes with technogenic materials

Vestnik MGSU ◽

10.22227/1997-0935.2015.11.101-109 ◽

2015 ◽

pp. 101-109 ◽

Cited By ~ 7

Author(s):

Aleksandr Dmitrievich Tolstoy ◽

Valeriy Stanislavovich Lesovik ◽

Liliya Khasanovna Zagorodnyuk ◽

Irina Aleksandrovna Kovaleva

Keyword(s):

Concrete Structure ◽

High Strength Concrete ◽

Raw Materials ◽

High Strength ◽

Cement Stone ◽

Strength Concrete ◽

Scientists And Engineers ◽

The Impact

Beginning with the 1970s many specialists have been dedicating their works to investigation of the possibility to use concrete modifications of non-organic materials containing amorphous silica. Almost any industrial product is beginning with raw materials obtained from the planetary interior or formed on its surface. That’s why the problem of selective choice and utilization of industrial waste is of a global character, so it is of great importance. Currently, the attention of scientists and engineers is attracted by the widespread use of high-strength concrete, different from the usual one by high content of cement stone, lesser grain size, multi-component, increased specific surface area of the filler. The performance properties of concrete to a large extent depend on the properties of aggregate and water content. It is known that empirical way to search for improving the strength of concrete has always been a laborious and time-consuming. In this regard, the actual conditions for forming a preliminary study of high-strength concrete structure have been investigated, as well as the role of processing methods in the process and nature of the impact on the quality of a concrete structure.

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