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Use of White Quartz Sand as Fine Aggregate in Concrete for Hydraulic Structures
This paper presents experimental results on mechanical and durability properties such as chloride ion permeability tests, water absorption of modified concrete containing whiter sand used as fine aggregate to partial or complete replacement of river sand. At the same time, the influence of mineral admixtures upto 35% contained in the mixture with and without nanosilica was used at 1 and 1,5% by wt. of cement as a partial replacement of cement on the properties of concrete was also studied. The results indicated that increase of white sand content replacement improves the chloride permeability and water absorption resistance of concrete. It was shown that when the replacement rate of white sand upto 100%, the water-absorption and chloride ion permeability values got been values of 0.374% and 72.4 C, respectively. Meanwhile, the reference sample containing 100% river sand obtained values of 0.442% and 284.2 C, respectively. The lowest water absorption and chloride ion permeability value in these concrete samples studied belongs to the nanosilica series with 66.2 C for № NS2 mixture, decreased by 5.97 and 6.89% compared to the control sample № NS1 and № NR1 (containing 1% Nano-SiO2), respectively. Also, the test results revealed that the optimum content of the white sand was 60% to produce the maximum increase in strength, in which the compressive strength value reached 95.5 MPa, flexural strength attained 9.78 MPa, and splitting tensile strength achieved 7.26 MPa at 28 days curing age.
Use of White Quartz Sand as Fine Aggregate in Concrete for Hydraulic Structures
This paper presents experimental results on mechanical and durability properties such as chloride ion permeability tests, water absorption of modified concrete containing whiter sand used as fine aggregate to partial or complete replacement of river sand. At the same time, the influence of mineral admixtures upto 35% contained in the mixture with and without nanosilica was used at 1 and 1,5% by wt. of cement as a partial replacement of cement on the properties of concrete was also studied. The results indicated that increase of white sand content replacement improves the chloride permeability and water absorption resistance of concrete. It was shown that when the replacement rate of white sand upto 100%, the water-absorption and chloride ion permeability values got been values of 0.374% and 72.4 C, respectively. Meanwhile, the reference sample containing 100% river sand obtained values of 0.442% and 284.2 C, respectively. The lowest water absorption and chloride ion permeability value in these concrete samples studied belongs to the nanosilica series with 66.2 C for № NS2 mixture, decreased by 5.97 and 6.89% compared to the control sample № NS1 and № NR1 (containing 1% Nano-SiO2), respectively. Also, the test results revealed that the optimum content of the white sand was 60% to produce the maximum increase in strength, in which the compressive strength value reached 95.5 MPa, flexural strength attained 9.78 MPa, and splitting tensile strength achieved 7.26 MPa at 28 days curing age.
Use of White Quartz Sand as Fine Aggregate in Concrete for Hydraulic Structures
Lecture Notes in Civil Engineering
Akimov, Pavel (editor) / Vatin, Nikolai (editor) / Tusnin, Aleksandr (editor) / Doroshenko, Anna (editor) / Fedosov, Sergey (author) / Aleksandrova, Olga (author) / Quang, Nguyen Duc Vinh (author) / Bulgakov, Boris (author) / Galtseva, Nadezhda (author)
2022-09-03
17 pages
Article/Chapter (Book)
Electronic Resource
English
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