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difference between quartz and quartzitic gravel
the aci 224-01 8.3.2 states "typically, some concretes of highly quartzitic gravels have a low strain capacity and a high modulus of elasticity. concretes with a low strain capacity are much more sensitive to shrinkage due to drying (and to a decrease in temperature) and will be subjected to a greater amount of cracking."
however in the same aci 224-01 3.4.2 states "quartz, limestone, dolomite, granite, feldspar, and some basalts can be classified as higher-modulus aggregates, which result in lower shrinkage properties of concrete."
is quartz and quartzitic gravel the same thing? if so, aci is really contradicting themselves
check out our whitepaper library.
quartz is a crystalline mineral while quartzite is a metamorphic rock. both are formed from silica but are otherwise quite different.
ok thanks for the clarification

2009-09-08, 06:42 PM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	difference between quartz and quartzitic gravel difference between quartz and quartzitic gravel the aci 224-01 8.3.2 states "typically, some concretes of highly quartzitic gravels have a low strain capacity and a high modulus of elasticity. concretes with a low strain capacity are much more sensitive to shrinkage due to drying (and to a decrease in temperature) and will be subjected to a greater amount of cracking." however in the same aci 224-01 3.4.2 states "quartz, limestone, dolomite, granite, feldspar, and some basalts can be classified as higher-modulus aggregates, which result in lower shrinkage properties of concrete." is quartz and quartzitic gravel the same thing? if so, aci is really contradicting themselves check out our whitepaper library. quartz is a crystalline mineral while quartzite is a metamorphic rock. both are formed from silica but are otherwise quite different. ok thanks for the clarification __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]