Some durability characteristics of ternary blended SCC containing crushed stone and induction furnace slag as coarse aggregate

Author(s):  
P. Chandru ◽  
J. Karthikeyan ◽  
Amit Kumar Sahu ◽  
Ketan Sharma ◽  
C. Natarajan
Author(s):  
A. Chernil'nik ◽  
D. El'shaeva ◽  
Y. Zherebtsov ◽  
N. Dotsenko ◽  
M. Samofalova

In conditions of dense urban development and a variety of engineering and geological conditions, the use of concretes with a combined aggregate of a rationally selected composition will solve the existing problem of reducing the mass of reinforced concrete structures of buildings and structures and maintaining the required strength and deformability. In this paper, studies have been carried out on the choice of a rational formulation of lightweight concrete based on expanded clay gravel, natural crushed stone and granulated blast furnace slag by varying the volume content of porous coarse aggregate and the volume content of fine aggregate in relation to the mixture. In total, 9 series of prototypes and 1 series of control samples are manufactured and tested. One series of samples includes three cubes with dimensions of 10x10x10 cm. All samples are tested in terms of density and compressive strength, the coefficient of constructive quality is determined. The results of the study shows that the introduction of expanded clay gravel into the composition of heavy concrete instead of part of the dense coarse aggregate and the replacement of the fine dense aggregate with granular blast furnace slag leads to an increase in the structural quality factor, that is, a decrease in the compressive strength of concrete is compensated for by an even more significant decrease in the density of the material, and means weight reduction. The increase in the coefficient of constructive quality of concrete based on expanded clay gravel, natural crushed stone and granulated blast-furnace slag in comparison with the control composition is 15.6 %.


2021 ◽  
Vol 2124 (1) ◽  
pp. 012017
Author(s):  
L R Mailyan ◽  
S A Stel’makh ◽  
E M Shcherban’ ◽  
D A Stroev

Abstract In the difficult conditions of modern construction, the use of concretes with a combined aggregate, if the composition is rational and the formulation and technological factors act rationally, will allow solving many existing problems. In this paper, studies were carried out on the choice of a rational formulation of lightened concrete based on foamed slag, natural crushed stone and granulated blast furnace slag by varying the volume content of a porous coarse aggregate and a fine aggregate in relation to the volume of the mixture. In total, 9 series of prototypes and 1 series of control samples were manufactured and tested. One series of samples includes three cubes with dimensions of 10x10x10 cm. All samples are tested for density, compressive strength and the coefficient of constructional quality. According to the results of the study, it was concluded that the introduction of foamed slag into the composition of heavy concrete instead of a part of a dense coarse aggregate and the replacement of a fine dense aggregate with granulated blast furnace slag leads to an increase in the coefficient of constructional quality, that is, the decrease in compressive strength of concrete is compensated by an even more significant decrease in the density of the material, and therefore a decrease in mass. The increase in the coefficient of constructional quality of concrete based on foamed slag, natural crushed stone and granulated blast furnace slag in comparison with the control composition was 14%.


Coarse Aggregate makes the predominant part in concrete which by implication implies it turns into the key segment in the solid blend, finding an option in contrast to customary coarse total in a way to such an extent that not bargaining with properties of ordinary one is an approach to the maintainable turn of events, it is likewise a need of the present to utilize the option in contrast to exhausting normal assets and make appropriate use or deterioration of existing waste. In this survey, an itemized report of examination done on the utilization of various waste material, for example, plastic waste, electronic waste, marble squander, squashed earthenware squander, Ferrochrome slag total, Induction furnace slag, Cuddapah stone waste and so forth in substitution or expansion to coarse aggregate in preparation of concrete is tended to. The diverse compound, mechanical and physical properties of waste material are looked at and talked about. It is seen that squander materials when added to the coarse total in ideal substance really increment quality properties, different properties of concrete are additionally contrasted with that of ordinary coarse total and particular change in properties is definite. The conversation is likewise finished concerning the correlation between what exploration is said and the code and arrangements of administration of India in IS 383:2016.


2015 ◽  
Vol 17 (3) ◽  
Author(s):  
Hartono Hartono

Hartono, in this paper explain that to obtain the allowed characteristic compressive strength of concrete from a concrete construction is quite difficult , because it is influenced by the mix of materials used for the manufacture of the construction, in which the require material of the concrete mix had to be in accordance with Reinforced Concrete Indonesia Rule Year 1991. The main factor of mix material that affect permitted the compressive strength of concrete is aggregate characteristics, namely the coarse aggregate or crushed stone. Therefore this study is intended to determine the compressive strength of concrete with the characteristics of coarse aggregate material of crushed stone that comes from limestone. This research use Gresik PC mixture concrete, muntilan sand, and kricak of limestone. To determine concrete compressive characteristics strength of concrete, concrete specimen as many as 20 pieces, with mixed-use PC weight ratio of 1 : 2 Ps : 3, cube molded kricak with the size of 15 cm X 15 cm X 15 cm was made. From these results, it can be obtained that concrete compressive characteristic strength σ 1 bk = 215.41 kg / cm2. Keyword: Concrete construction


Materials ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 843
Author(s):  
Yuji Miyazaki ◽  
Takeshi Watanabe ◽  
Yuji Yamada ◽  
Chikanori Hashimoto

Since high quality natural aggregates are becoming scarce, it is important that industrial recycled products and by-products are used as aggregates for concrete. In Japan, the use of recycled aggregate (RG) is encouraged. Since, strength and durability of recycled aggregate concrete is lower than that of normal aggregate concrete, the use of recycled aggregate has not been significant. In order to improve physical properties of concrete using recycled coarse aggregate, blast furnace slag sand has been proposed. Recently, blast furnace slag sand is expected to improve durability, freezing, and thawing damage of concrete in Japan. Properties of fresh and hardened concrete bleeding, compressive strength, and resistance to freezing and thawing which are caused by the rapid freezing and thawing test using liquid nitrogen is a high loader than the JIS A 1148 A method that were investigated. As a result, concrete using treated low-class recycled coarse aggregate and 50% or 30% replacement of crushed sand with blast furnace slag sand showed the best results, in terms of bleeding, resistance to freezing and thawing.


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