silt content of fine aggregate


    Objective To determine quantity of silt in fine aggregates in the field Theory There are two types of harmful substances preset in fine aggregates i.e. organic matter produced by decay of vegetable matter and/or clay and silt, which form coating thus preventing a good bond between cement and the aggregates.


    4. Sieve Analysis. Sieve analysis is done to check the gradation of aggregate. The test is done as follow. Take required amount of aggregate sample (for coarse aggregate take apprx. 2.5 kg and for fine aggregate take 0.5 kg)

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    Factors Affecting ASR For alkali-silica reaction to occur, three conditions must be present: • reactive forms of silica in the aggregate • high-alkali (pH) pore solution


    The boundary between sand and silt (62 µm) separates coarse-grained sediments (sand and larger particles) from fine-grained sediments (silt and clay particles).


    The boundary between sand and silt (62 µm) separates coarse-grained sediments (sand and larger particles) from fine-grained sediments (silt and clay particles).

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