What is the quality of water for concrete?
Table of Contents
- 1 What is the quality of water for concrete?
- 2 Is code for water test for concrete?
- 3 Which water used for cement concrete work should be?
- 4 What is the permissible limit of sulphates in water for construction?
- 5 What is the maximum specification for water cement ratio?
- 6 How does water weaken concrete?
- 7 What is the limit of turbidity of effluent?
- 8 What are the limits for concrete construction water tests?
What is the quality of water for concrete?
Quality of Water for Concrete Construction and its Specification
| Type of Solid in water | Permissible Limits for Construction |
|---|---|
| Inorganic matter | 3000 mg/l |
| Sulphates (SO4) | 500 mg/l |
| Chlorides (Cl) | a) 1000 mg/l for RCC work and, b) 2000 mg/l for PCC work |
| Suspended matter | 2000 mg/l |
Is code for water test for concrete?
These tests on water for concrete construction is discussed. Quality of water for construction use is determined in the laboratory. This test is done as per clause 3.1. 1 of IS 3025….Recommended Limits for Concrete Construction Water Tests.
| Types of solids | Limits |
|---|---|
| Sulphates | 400 mg/liter |
How much water does concrete use?
In order to have enough water to possibly enable complete hydration of the cement, approximately 20 pounds of water to every 100 pounds of cement is necessary. Combined, this equates to approximately 45 pounds resulting in a w/cm of 0.45.
What is water used for in concrete?
Water is important at many stages of concrete production. It is essential to the hydration of cement and is also used for washing during the extraction of aggregates, as quenching for GGBS, during the mixing and placing of concrete, for cleaning plant and in dust suppression measures.
Which water used for cement concrete work should be?
Potable water is generally considered satisfactory for mixing. The pH value of water should be not less than 6. It has been observed that certain common impurities in water affect the quality of mortar or concrete.
What is the permissible limit of sulphates in water for construction?
500mg/l
Explanation: 500mg/l is the standard value for the permissible limits for construction of sulphates in water.
What is the permissible limit of drinking water?
WHO has prescribed a provisional guideline value of As 10 μg/l in drinking water and according to India standard drinking water specification 1991, the highest desirable limit is 50 μg/l and no relaxation for maximum permissible level.
What is the permissible limit of pH value of the water used for mixing & curing of cement concrete as per IS 456 2000?
pH value IS456- 2000[6] ≥6.0 – Water used for mixing and curing shall be clean and free from injurious amounts of oils, acids, alkalis, salts, sugar, organic materials or other substances that may be deleterious to concrete or steel.
What is the maximum specification for water cement ratio?
As per IS Code of practice 456–2000 , Maximum free water cement ratio is 0.50 for Reinforced Cement Concrete. The water–cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix.
How does water weaken concrete?
The increased water leads to a higher water-to-cement ratio. When excess water creates greater spaces between aggregate materials, the voids fill with air after the moisture evaporates. The resulting inadequate compaction reduces the concrete’s strength.
What happens when you put too much water in concrete?
Effects of too much mixing water Lower compressive strengths. Segregation of the concrete mix under certain conditions resulting in variable quality throughout the concrete mass. Cracking – with too much water, there will be lower tensile strength, and a tendency towards high shrinkage and subsequent cracking.
What is water turbidity and how is It measured?
Turbidity is a measure of water clarity how much the material suspended in water decreases the passage of light through the water. Suspended materials include soil particles (clay, silt, and sand), algae, plankton, microbes, and other substances. These materials are typically in the size range of 0.004 mm (clay) to 1.0 mm (sand).
What is the limit of turbidity of effluent?
To produce great quality effluent by using the least amount of chemical, the dose of the chemical can be adjusted or balanced by turbidity information. NOTE: According to IS 10500:1991 the maximum limit of turbidity is 10 NTU and up to 5 NTU water is acceptable and above 5 NTU the consumer acceptance decreases.
What are the limits for concrete construction water tests?
Recommended Limits for Concrete Construction Water Tests Types of solids Limits Inorganic solids 3000 mg/liter Sulphates 400 mg/liter Chlorides 2000 mg/liter for concrete not containin Suspended matter 2000 mg/liter
How does the quality of water affect the strength of concrete?
The quality of water used has a direct impact on the strength of the motor and cement concrete in the construction work. The water used for curing and mixing must be free from high quantities of alkalis, acid, oils, salt, sugar, organic materials, vegetable growth, etc that might be deleterious to bricks, concrete or iron.