In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful organic matter or algae, which could adversely affect the concrete's properties. The permissible limits for these impurities vary as per different standards like BS 3148:1980, BS EN 1008:2002 and ASTM C 1602–06. Silt content, if high, can be mitigated by allowing the water to stand in a settling basin, and wash water from concrete mixers can be reused if clean. Although potable water can also be suitable for curing, it's crucial that curing water lacks impurities like free carbon dioxide, which can erode hardened concrete, and iron or organic matter that may cause staining. The use of seawater, while considered for regions with freshwater scarcity, poses risks like reinforcement corrosion and efflorescence, thereby being generally inadvisable for mixing or curing. Thus, while water quality requirements for concrete mixing and curing are stringent, some flexibility exists based on the concrete application and environmental considerations.

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5.7 : Quality of Water

Aggregates and Water

55 Ansichten

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5.1 : Unsoundness of Aggregate due to Volume Change

Aggregates and Water

67 Ansichten

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5.2 : Deleterious Substances in Aggregate

Aggregates and Water

101 Ansichten

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5.3 : Sieve Analysis and Grading Curves

Aggregates and Water

174 Ansichten

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5.4 : Fineness Modulus

Aggregates and Water

116 Ansichten

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5.5 : Types of Aggregate Grading

Aggregates and Water

211 Ansichten

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5.6 : Maximum Size of Aggregate

Aggregates and Water

39 Ansichten

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5.8 : Testing Water Quality

Aggregates and Water

73 Ansichten

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5.9 : Aggregates Classification

Aggregates and Water

271 Ansichten

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5.10 : Shape and Texture of Coarse Aggregate

Aggregates and Water

135 Ansichten

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5.11 : Bonding and Strength of Aggregate

Aggregates and Water

105 Ansichten

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5.12 : Toughness and Hardness of Aggregate

Aggregates and Water

177 Ansichten

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5.13 : Specific Gravity of Aggregate

Aggregates and Water

140 Ansichten

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5.14 : Bulk Density of Aggregate

Aggregates and Water

329 Ansichten

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5.15 : Porosity and Absorption of Aggregate

Aggregates and Water

196 Ansichten

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