The proportions of aggregates and cement are important as they are used to obtain optimized, workable and cohesive concrete for a set of locally available concrete ingredients.
When analyzing / designing a concrete mix, the proportion of aggregate cement plays following important roles.
1. The ratio of total aggregate per cement (A / C) decreases with increasing degree of concrete. For example, the degree of aggregate M20 will have an A / C ratio higher than that of M30
The weaker the A / C ratio of the concrete mix, the lower the cement con ....etc

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hye..im onie rasli..from politeknik ungku omar, malaysia..im now on my last year for civil engineering diploma..i need information n details about study on strength behaviour of concrete using foundry dust in fine aggregate..so i hope u could email full report for me.. [email protected]
thanks for ur cooperation.. =) ....etc

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ppt of reflection cracking studies of high strength high volume flyash concrete beam analyzing using fem ....etc

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Acute shortage and high price for river sand has lead to the adulteration of sand with salty sea sand which has raised serious concern among builders. The natural river sand was the cheapest resources of sand. However the excessive mining of rive bed to meet the increasing demand for sand in construction industry has lead to the ecological imbalance.
High Strength
The superior shape, proper gradation of fines, smooth surface texture and consistency in production parameter of chemically stable sands provide greater durability and higher stren ....etc

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go through a research on STUDY OF CONCRETE BEHAVIOUR OF CONCRETE USING FOUNDRY DUST IN FINE AGGREGATE
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Abstract
This paper focuses on the experimental investigation carried out on high strength concrete reinforced with hybrid fibres (combination
of hooked steel and a non-metallic fibre) up to a volume fraction of 0.5%. The mechanical properties, namely, compressive strength, split
tensile strength, flexural strength and flexural toughness were studied for concrete prepared using different hybrid fibre combinations
steel polypropylene, steel polyester and steel glass. The flexural properties were studied using four point bending t ....etc

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May i know what is that FOUNDRY DUST and may i know the ratio to mix with fine aggregate ? ....etc

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