CAN SEA WATER BE USED FOR MAKING CONCRETE? - CivilBlog.Org
Jun 28, 2014 · Hence the sea water can be used for making cement for structures where such fall in strength is permissible or where it is possible to correct the same by adjusting water-cement ratio, cement content in concrete etc. The sea water tends to develop dampness and efflorescence.
Concrete Exposed to Seawater – Effects and Preventions
The concrete structures built in marine conditions are always exposed to seawater either directly or indirectly. The coastal and offshore structures are always in contact with seawater and there are number of physical and chemical deterioration processes takes place. So, Concrete structures effected by seawater requires special attention.
Possibility of Sea Water as Mixing Water in Concrete
Possibility of Sea Water as Mixing Water in Concrete 1274 As mixing water, tap water and sea water were used. The chemical components of sea water are shown in Table 1. River gravel was used for coarse aggregates, and the maximum size was 25 mm. Also, river sand was used as fine aggregate. The used steel bars were 9 mm diameter round bars
Concrete Mixing Ratios - How To Make Concrete (Cement, Sand ...
The less water you use to mix the concrete (somewhat dry but workable) the stronger the concrete mix. Accurate concrete mixing ratios can be achieved by measuring the dry materials using buckets or some other kind of measuring device. By measuring the cement, stone, and sand, you will have a consistent concrete mix throughout your entire ...
CIVILSTAGRAM: Use Of Sea Water For Mixing Concrete
Mar 02, 2016 · Therefore sea water should not be used even for PCC if aggregates are known to be potentially alkali reactive. It is reported that the use of sea water for mixing concrete does not appreciably reduce the strength of concrete although it may lead to corrosion of reinforcement in certain cases.
Fresh and hardened properties of seawater-mixed concrete ...
Nov 30, 2018 · Ready-mix concrete with a 28-day 60-MPa design compressive strength was used to cast the specimens. In accordance with BS EN 206 , the mixture proportions for concrete per cubic meter were 756 kg of sand, 1144 kg of gravel, 158 kg of ordinary Portland cement, 292 kg of blast furnace slag, and 164 kg of water; with a water-to-cementitious material (w/cm) ratio of 0.34.
TECHNICAL PAPER Eﬀect of seawater for mixing and curing on ...
The fresh water used for mixing and curing the concrete specimens was drinking water according to ASTM C190, and seawater con-taining about 40,000 ppm of dissolved salts with a pH value of about 8.2 was used. A target slump of 50–70 mm was selected for all mixes, and all the required materials for preparing concrete were weighed
Suitability of sea water on curing and compressive strength ...
Divergent options exist on the effect of sea water as mixing water in concrete. As sea water contains various types/amounts of dissolved salts that can react with reactive aggregates, sea water should not be used even for plain concrete if the aggregates are known to be potentially alkali reactive. It is reported that the use of sea water for ...
Mix the cement and water until thoroughly combined. Mix with a garden hoe and shovel if you mix in a wheelbarrow, or turn the hand crank to tumble the ingredients inside a rotating concrete mixer. Scrape the sides of the wheelbarrow or mixer well to ensure all the dry cement is completely saturated.
Sea Water in or on Concrete| Concrete Construction Magazine
Mar 01, 1973 · In general, good quality concrete is adequately resistant to the effects of sea water, salt water, salt and salt-bearing materials that come into contact with it externally. If these materials contain large amounts of sulfate, however, it is desirable to make the concrete with Type V cement.
Technical Committee on the Use of Sea Water in Concrete
In concrete industry, several billion tons of water, as mixing water, curing water and cleaning water, is annually used on the earth, and the use of sea water is inhibited. If the use of sea water in concrete industry is permitted, the fresh water is much saved. In this research, information on the usage of sea water as mixing water and curing ...
Apr 23, 2014 · In general, less water produces better concrete. However, concrete needs enough water to lubricate and provide a workable mixture that can be mixed, placed, consolidated and finished without problems.
What is Water Cement Ratio? Its Calculation [Complete Guide]
This is another defect of extra water added to concrete-mix. Water Quantity Calculation for Concrete. For the calculation of water quantity for concrete, first of all, we have to find the quantity of cement. Just assume that the required volume of cement for the mix is 100 kg and W/C is 0.4. Water Quantity = Water-Cement Ratio x Volume of Cement.