Investigation of Drying Shrinkage of Concrete Prepared with Iron Mine Tailings

2011 ◽  
Vol 477 ◽  
pp. 37-41 ◽  
Author(s):  
Xiao Xin Feng ◽  
Xue Li Xi ◽  
Ji Wei Cai ◽  
Hong Jun Chai ◽  
Yu Zeng Song
Keyword(s):  
Natural Condition ◽  
Mine Tailings ◽  
Coarse Aggregate ◽  
Drying Shrinkage ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Natural Sand ◽  
Iron Mine

Concretes of C30 and C60 were prepared with iron mine tailings as fine aggregate and coarse aggregate and with natural sand and common crushed stone separately. The drying shrinkage of concretes cured under the natural condition in the laboratory was tested. The results showed that whether C30 or C60 the drying shrinkage of concrete prepared with iron mine tailings was a little smaller than that of concrete with natural sand and common crushed stone. It was also found that whether the concrete with iron mine tailings or the concrete with natural sand and common crushed stone the drying shrinkage of C60 concrete was larger than that of C30 concrete.

scholarly journals Durability and Shrinkage Characteristics of Self-Compacting Concretes Containing Recycled Coarse and/or Fine Aggregates

2015 ◽  
Vol 2015 ◽  
pp. 1-18 ◽  
Author(s):  
Mehmet Gesoglu ◽  
Erhan Güneyisi ◽  
Hatice Öznur Öz ◽  
Mehmet Taner Yasemin ◽  
Ihsan Taha
Keyword(s):  
Coarse Aggregate ◽  
Gas Permeability ◽  
Drying Shrinkage ◽  
Recycled Aggregate ◽  
Fine Aggregate ◽  
Restrained Shrinkage ◽  
Durability Properties ◽  
Recycled Fine Aggregate ◽  
Restrained Shrinkage Cracking ◽  
Fine Aggregates

This paper addresses durability and shrinkage performance of the self-compacting concretes (SCCs) in which natural coarse aggregate (NCA) and/or natural fine aggregate (NFA) were replaced by recycled coarse aggregate (RCA) and/or recycled fine aggregate (RFA), respectively. A total of 16 SCCs were produced and classified into four series, each of which included four mixes designed with two water to binder (w/b) ratios of 0.3 and 0.43 and two silica fume replacement levels of 0 and 10%. Durability properties of SCCs were tested for rapid chloride penetration, water sorptivity, gas permeability, and water permeability at 56 days. Also, drying shrinkage accompanied by the water loss and restrained shrinkage of SCCs were monitored over 56 days of drying period. Test results revealed that incorporating recycled coarse and/or fine aggregates aggravated the durability properties of SCCs tested in this study. The drying shrinkage and restrained shrinkage cracking of recycled aggregate (RA) concretes had significantly poorer performance than natural aggregate (NA) concretes. The time of cracking greatly prolonged as the RAs were used along with the increase in water/binder ratio.

Experimental Study on Producing Concrete Hollow Block with Mining Slag

2011 ◽  
Vol 261-263 ◽  
pp. 820-823 ◽  
Author(s):  
Yu Ze Tian
Keyword(s):  
Experimental Study ◽  
Mine Tailings ◽  
Coarse Aggregate ◽  
National Standards ◽  
Iron And Steel ◽  
Mix Proportion ◽  
Iron Mine ◽  
Sample Test ◽  
Waste Rocks ◽  
Hollow Block

The experiments of compressive strength about maix proportion of concrete are repeatedly done, adopting orthogonal experimental method. In this experiment, dry separation waste rocks and mine tailings in mining slag of Qidashan Iron Mine which is subsidiary company of Anshan Iron and Steel Corporation are used instead of traditional fine and coarse aggregate concretes. Then the optimized mix proportion is determined to make the concrete small hollow blocks. Sample test shows that it is feasible to make load bearing concrete small hollow blocks which can meet national standards.

Compressive Strength of Concrete with Recycled Glass as Partial Aggregate Replacement

2014 ◽  
Vol 803 ◽  
pp. 21-25 ◽  
Author(s):  
Roszilah Hamid ◽  
M.A. Zubir
Keyword(s):  
Glass Sample ◽  
Coarse Aggregate ◽  
Control Sample ◽  
Fine Aggregate ◽  
Portland Cement Concrete ◽  
Natural Sand ◽  
Recycled Glass ◽  
Compressive Strength Of Concrete ◽  
Significant Increment ◽  
Control Samples

In this study, recycled glass is used to replace the natural fine aggregate in different mix proportions to obtain the optimum combination that will produce the highest strength. The control samples are Grade 30 ordinary Portland cement concrete (OPCC) containing 100% natural sand and coarse aggregate. The recycled glass concretes contain 70% natural fine aggregate + 30% size 300 micron crushed glass (Sample 2), and 70% fine aggregate + 15% size 300 micron crushed glass + 15% size greater than 300 micron crushed glass (Sample 3). The compressive strengths of the concrete samples with recycled glass are higher than the control samples at all ages of 7, 28, 56 and 90 days. At age 60 days, the strength gain of the control samples shows no significant increment but both samples that include recycled glass still show significant increment in strength. It is found that recycled glass performed better when utilised at size 300 microns and less. The recorded strength of the control, Sample 2 and 3 at 90 days are 47, 61 and 55 MPa.

scholarly journals SELECTION OF A RATIONAL RECIPE OF LIGHTWEIGHT CONCRETE ON A MIXTURE OF CERAMSITE GRAVEL, NATURAL CRUSHED STONE AND GRANULAR SLAG

2021 ◽  
Vol 6 (12) ◽  
pp. 34-42
Author(s):  
A. Chernil'nik ◽  
D. El'shaeva ◽  
Y. Zherebtsov ◽  
N. Dotsenko ◽  
M. Samofalova
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Volume Content ◽  
Blast Furnace Slag ◽  
Coarse Aggregate ◽  
Lightweight Concrete ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Granulated Blast Furnace Slag ◽  
Furnace Slag

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 %.

Strength of Concrete with Ceramic Waste and Quarry Dust as Aggregates

2013 ◽  
Vol 421 ◽  
pp. 390-394 ◽  
Author(s):  
Abdullah Mohd Mustafa Al Bakri ◽  
M.N. Norazian ◽  
M. Mohamed ◽  
H. Kamarudin ◽  
C.M. Ruzaidi ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
Industrial Wastes ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Conventional Concrete ◽  
Ceramic Waste ◽  
Compressive Strength Of Concrete ◽  
Quarry Dust

This research focuses on a study of the strength of concrete with ceramic waste as coarse aggregate and quarry dust as fine aggregate. The sources of ceramic waste and quarry dust are obtained from the industrial in Malaysia. Presently, in ceramics industries the production goes as waste, which is not under going the recycle process yet. In this study an attempt has been made to find the suitability of the ceramic industrial wastes and quarry dust as a possible replacement for conventional crushed stone coarse and fine aggregate. Experiment were carried out to determine the strength of concrete with ceramic waste coarse aggregate and quarry dust fine aggregate to compare them with the conventional concrete made (with crushed stone coarse aggregate). From the results show that compressive strength of concrete with quarry dust as aggregates is the highest with 30.82 MPa with density 2251.85 kg/m3. This show, ceramic waste and quarry dust can be alternative aggregate for comparable properties.

scholarly journals Strength Appraisal of Light Weight Green Concrete Made with Cold Bonded Fly Ash Coarse Aggregate

2019 ◽  
Vol 8 (3) ◽  
pp. 5381-5385
Keyword(s):  
Fly Ash ◽  
Coarse Aggregate ◽  
Crushed Stone ◽  
Artificial Light ◽  
Fine Aggregate ◽  
Light Weight ◽  
River Sand ◽  
Manufactured Sand ◽  
Fly Ash Concrete ◽  
Coarse Aggregates

This study focusses on the development of fly ash concrete made with water/cement ratio of 0.5.To develop fly ash concrete in this study, 40% of cement is replaced with fly ash, manufactured sand is used as fine aggregate, light weight fly ash aggregate as used coarse aggregate and for mixing concrete instead of tap water 12% lime concentrated water is used. The fly ash concrete compressive strength obtained is equivalent to that of M30 grade concrete made with OPC. Two sets of samples are prepared one set with 40% fly ash concrete made with river sand and natural crushed stone coarse aggregates and another set of sample with 40% fly ash concrete made with manufactured sand and artificial light weight fly ash coarse aggregates. Experimental studies revealed that use of manufactured sand enhanced compressive, tensile and flexural strengths by 6-8% only. Even permeation properties such as water absorbtion and porosity of fly ash concrete made with manufactured sand and artificial light weight fly ash coarse aggregates is almost similar to that of fly ash concrete made with made with river sand and natural crushed stone coarse aggregates. The results conclude that fly ash coarse aggregates can be used for structural applications instead of natural coarse aggregates but not feasible for use in pavement as per IS 2386. Manufactured sand can be used as 100% replacement to river sand in fly ash based concretes with improved properties of concrete

scholarly journals Comparison of Compressive Strength Value of Concrete Using Pumice Sand with Ordinary Sand as Fine Aggregate

2021 ◽  
Vol 328 ◽  
pp. 10017
Author(s):  
Nu’ Man ◽  
Abdul Gaus ◽  
Mufti Amir Sultan
Keyword(s):  
Compressive Strength ◽  
Coarse Aggregate ◽  
The Other ◽  
National Standard ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Pumice Sand ◽  
Compressive Strength Of Concrete ◽  
Test Objects ◽  
Made In

In this study, the method according to the Indonesian National Standard (SNI) was applied. The objects test in the form of cylindrical concrete in which the fine aggregate was pumice sand and ordinary sand. The test objects made were tested for compressive strength. There were 6 test objects made in this study with a size of 15 cm x 30 cm. In detail, 3 test objects were made of pumice sand, while the other 3 test objects were made of ordinary sand. The coarse aggregate for all test objects was crushed stone. The result shown the use of pumice sand as a substitute for fine aggregate can reduce the compressive strength of concrete by 23.53%. However, it can reduce the weight of concrete by 7.03%. Therefore, for construction that prioritizes weight, concrete with pumice sand as fine aggregate is better compared to concreate with ordinary sand as fine aggregate.

scholarly journals Selection of a rational formulation of lightened concretes on combined aggregates

2021 ◽  
Vol 2124 (1) ◽  
pp. 012017
Author(s):  
L R Mailyan ◽  
S A Stel’makh ◽  
E M Shcherban’ ◽  
D A Stroev
Keyword(s):  
Compressive Strength ◽  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Coarse Aggregate ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Existing Problems ◽  
Granulated Blast Furnace Slag ◽  
Foamed Slag ◽  
Furnace Slag

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%.

scholarly journals Pengaruh Pemanfaatan Limbah Kulit Kerang Bambu Sebagai Pengganti Sebagian Semen Terhadap Kuat Tekan Beton dengan Penggunaan Agregat Kasar Madura

2021 ◽  
Vol 4 (1) ◽  
pp. 21
Author(s):  
Taurina Jemmy Irwanto ◽  
Agus Irmawan
Keyword(s):  
Compressive Strength ◽  
Portland Cement ◽  
Coarse Aggregate ◽  
Crushed Stone ◽  
Fine Aggregate ◽  
Compressive Test ◽  
The World ◽  
Chemical Content ◽  
Compressive Strength Of Concrete ◽  
Local Materials

Concrete is a mixture of Portland cement, fine aggregate, coarse aggregate and water, the author tries to use local Madura crushed stone and bamboo shells as a partial substitute for cement to determine whether the effect of utilizing local waste and materials on the planned compressive strength of concrete. In addition to the use of local materials, it is used shellfish waste which is expected to be able to provide the latest innovations in the world of construction in the future. In this test, concrete is planned in the form of a cube of size 15x15x15 cm, and tested at the age of 7 days and 28 days for each variation of the mixture, the research was carried out using several variations of the concrete mixture, namely, 0%, 2%, 4% and 6% replacement of cement with shells. bamboo shells, where later the 0% variation will be the benchmark for each variation. From the results of testing the chemical content of bamboo clam shells, it was found that the content of lime (CaO) was 98.23%. The results of the compressive test for each variation resulted in an increase in compressive strength from each variation. The greatest increase in compressive strength is at 6% variation with the resulting compressive strength of 21.94 MPa.

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