Use of fine recycled concrete aggregates in concrete: A
The water-soluble sulfates were 0.08–0.24% and the total sulfur content was 0.35–0.62%. The Na 2 O eq was 0.46–1.5% for fRCA [ 85 ]. The crushing of The investigated scales of fine aggregate with sulfates contents were (0.37%, 0.5%, 1.0%, and 1.5%) which is corresponding replacement by weight of cement (PDF) SULFATES EFFECT IN FINE AGGREGATE ON SELF COMPACTING CONCRETE
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Sulfate resistance of ultrahigh-performance concrete with recycled fine
The effect of sulfate attack (SA) on the strength of ultrahigh-performance concrete (UHPC) made with different replacements (0%, 50% and 100% by weight) of Each group consisting of four set with different ratio of sulfate (0.28% (reference SO3), 0.5%, 1% and 1.5%) by weight of fine aggregate where these ratios approximate the actual reality of...(PDF) Studying The Effect of Internal Sulfates on
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Compressive strength assessment of sulfate-attacked concrete
Sulfate attack is a major cause of concrete durability deteriorations. Mass loss, strength reductions, and expansive strain of concrete specimens are generally used The treatment process of (1 kg) fine aggregate (sand with SO3 = 2.1%) needs (10 L) of magnetic water (intensity of 9000 Gauss). • It observed that less sulfate Solving high sulfate content of sand used in concrete by magnetic water
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Evaluation of sulfate resistance of cement mortars with the
In this study, the effect of FSP replacement in fine aggregate on the resistance of sulfate attacks was investigated. For two mixtures of 48.5% and 58.5% Abstract The effect of sulfate attack (SA) on the strength of ultra-high performance concrete (UHPC) with recycled fine aggregate (RFA) is investigated. RFA is Sulfate resistance of ultra-high performance concrete with
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Influence of Internal Sulfate Attack on Some Properties
fine aggregate with sulfate content higher than that studied by the Iraqi Specification limit to (0.5%), but the total sulfate content of the mix is to be within the IQS, No.45, 1984 .Sulfate attack on concrete is a key durability problem. Internal sulfate attack (ISA) on concrete is a reaction between sulfates present in the original mix of concrete and the calcium aluminate in Deterioration Process of Concrete Exposed to
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Study on Mix Proportion Design Based on
This paper presents the mechanical properties of 100% recycled aggregate concrete (RAC), and the results and analysis of the dry–wet cycle accelerated sulfate attack test. The results show that Carbonate content of fine aggregates for concrete pavement surface When it is required to control the carbonate content in fine aggregates for use in concrete surface courses, the carbonate content shall be determined as specified in EN 196-21:1989, clause 5, with the test portion being prepared in accordance with EN 1744-1: 1998123 and theChemical Requirement of Aggregates as per European Standards
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Deterioration Process of Concrete Exposed to Internal Sulfate
With an increase in the SO 3 content in aggregate, the concrete expansion increased, and the compressive strength decreased. However, if the SO 3 content was lower than 1.5% and 3% in fine aggregate and coarse aggregate, respectively. Although, the expansion was not obvious, and the compressive strength of samples was above the initial strengthIn this study, fine stone powder (FSP) generated in the process for producing crushed coarse and fine aggregate was used as a partial replacement for the fine aggregate. The durability of mortars was investigated under sulfate attack in terms of compressive strength loss, change in mass, and expansion. Cement mortars were made Evaluation of sulfate resistance of cement mortars with the
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(PDF) Effect of Using River Sand on The Strength of
The experimental test results have revealed that it is possible to obtain a normal and high strength concrete with acceptable compressive and flexural strengths values by using river sand withThe sulfate content in fine aggregate contains sulfate higher than the acceptable limi ts in most of the fine aggregate in Middle East countries ( Al -Kadhimi and Hamid, 1983) .(PDF) SULFATES EFFECT IN FINE AGGREGATE ON SELF COMPACTING CONCRETE
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Compressive strength assessment of sulfate-attacked concrete
The water demand ratio is 99% and the ignition loss is 1.64%. The fine aggregate used in this test is river sand. Mass loss. Fig. 5 illustrates the development of mass loss with sulfate attack time. the sulphate ion content decreases rapidly along the depth and the sulphate ion content in concrete under dry-wet cycling is obviously higherSand contaminated with sulphates is a local problem in the Middle East Area. It is difficult to obtain well graded sand with sulphate content within the limits specified by international standards. International standard adopt different concepts in limiting internal SO3 contents in concrete. Some standards put maximum limits for SO3 by weight of Limiting total internal sulphates in 15–75 MPa concrete in
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(PDF) Sulfate Resistance of Recycled Aggregate
Sudhir Goyal. In the present work, a geopolymer concrete composite is developed using GGBS, Fly ash and superplasticizer. Two types of samples are prepared with increasing dosage ofContribute to lbsid/en development by creating an account on .en/sulphate and chloride content for fine aggregate to 5.md
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Quantitative determination of sulfur content in concrete with
The determination of sulfate content in concrete is carried out for damage assessment before reconstruction and during repair for quality assurance of repair works. Chemical reactions between sulfates or sulfuric acid and the cementitious material lead to destruction of the concrete structure and therefore to a decrease in strength.Current Hong Kong standard “CS3: 2013 Aggregates for Concrete” [27] still adopts the regulations in the canceled BS 882-1992 [18] about the chloride content in compound aggregates including fine and coarse aggregates, which are: 0.01% for pre-stressed concrete and steam-cured structural concrete, 0.03% for structural concrete Discussion and experiments on the limits of chloride, sulphate
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Chloride Analysis of Sea Sand for Making Concrete
Sea sand is not used in concrete, since it contains chloride ions which can corrode steel. In order to avoid the corrosion, the salt content of the sea sand must be eliminated before being utilized in concrete. Present paper investigates adopting sea sand as fine aggregate in concrete. The physical properties like specific gravity, percentageIn the case of specimens with known chloride content, they had a final chloride concentration of 0%, 0.18%, 0.37%, and 0.74% with respect to the total weight of the concrete. In the case of sulphate quantification, concrete specimens had added sulphate percentages of 0%, 0.25%, 0.5%, and 1% with respect to the total weight of the concrete.Quantification of Chlorides and Sulphates on Concrete
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Properties and composition of recycled aggregates from
A high correlation was found between the adhered mortar content and sulphate content (i.e. samples with higher mortar content had higher sulphate content), Recycling of waste glass as a partial replacement for fine aggregate in concrete. Waste Manage, 29 (2) (2009), pp. 655-659. View PDF View article View in Scopus Google The effect of recycled concrete aggregate (RCA) on concrete performance against external sulfate attack (ESA) is not yet fully known. In this paper, recycled aggregate concretes (RAC) with 0, 50Influence of recycled fine aggregates on the resistance of
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Concrete Definition, Composition, Uses, Types, & Facts
Aggregates are generally designated as either fine (ranging in size from 0.025 to 6.5 mm [0.001 to 0.25 inch]) or coarse (from 6.5 to 38 mm [0.25 to 1.5 inch] or larger). All aggregate materials must be clean and free from admixture with soft particles or vegetable matter, because even small quantities of organic soil compounds result in Solving high sulfate content of sand used in concrete by Jan 01, 2021 The main objective and aim of this study are to find an easy and suitable solution (magnetic water process) to treat fine aggregate (sand) from high sulfate content (sulfate washing process). Fig. 1 shows the mechanism of magnetic water technology.sulfate contents in fine aggregate fo concrete
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