Journal of Materials and Engineering Structures
Volume 12, Numéro 3, Pages 385-395
2025-09-30
Experimental Research On Evaluation Of The Possibility Of Using Crushed Stone Dust At Nghe An Province-viet Nam For Reinforced Concrete Beams
Authors : Duc Phan Van . Phuc Ho Van . Hung Ho Van . đinh Truong Quoc . Hieu Nguyen Xuan . Long Tran Ngoc . Kien Nguyen Trong .
Abstract
In this paper, the use of crushed stone dust in Nghe An province is studied to replace natural sand in the production of concrete of compressive strength level B15. To evaluate the possibility of replacing part of natural sand in concrete with crushed stone dust according to the Vietnamese system of standards for designing reinforced concrete structures, the experimental study is analyzed based on experiments including: (i) Determining grain size, (ii) determining slump, (iii) compressing cube specimens to determine compressive strength, (vi) pulling out test to determine the bond force between steel and concrete, (v) bending compression of beam specimens of size 10×15×120 cm to failure. The initial research results show that the compressive strength at 28 days of cube concrete specimens using crushed stone dust exceeds 7,2-12,6% compared to concrete using natural sand. The beam sample using a small aggregate of 50% natural sand + 50% crushed stone dust has a greater load-bearing capacity than the reinforced concrete beam sample using 100% natural sand and is 6% larger.
Keywords
Crushed Stone dust ; Natural Sand ; RC Beams ; Bending Compression
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