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en.cnki.com.cn/Article_en/CJFDTOTAL-GXYB199002002.htm
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U-type expansive agent for concrete is an additive made by ...
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www.cbma.com.cn/english/cn/03jscp/kjcg.htm
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Alunite expansive cement and alunite concrete expansive admixture 5. ... Development and application technology of U type expansive? agent for concrete 5.
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www.freepatentsonline.com/4565579.html
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Jan 21, 1986 ... In rock or concrete breaking operations, this composition in the form of aqueous ..... For example, an expansion agent, water-reducing agent, viscosity ... alunite, zeolite and bauxite and calcium aluminate base materials such ...
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www.fhwa.dot.gov/infrastructure/materialsgrp/cement.htm...
www.fhwa.dot.gov/infrastructure/materialsgrp/cement.html
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Because cement is the most active component of concrete and usually has the greatest unit cost, ... IA4, A type I cement containing an integral air-entraining agent .... the expansion of mortar bars in an autoclave (ASTM C 191, AASHTO T 130).
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ebooks.narotama.ac.id/files/Building%20Materials%20in%2...
ebooks.narotama.ac.id/files/Building%20Materials%20in%20Civil%20Engineering/Chapter%205%20Concrete.pdf
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Expansion agent is the admixture that can make concrete produce shrinkage compensating or micro-expansion. The common expansion agent is alunite ...
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users.ntua.gr/katsioti/4_a_11.pdf
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of jarosite–alunite precipitate did not negatively affect the quality of the produced ... cements have been successfully developed by the concrete ... by adding a neutralizing agent. .... Expansions of the cement pastes were determined by Le ...
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users.ntua.gr/katsioti/4_a_09.pdf
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represents jarosite, whereas for y = 3 it represents alunite. The above precipitate is ... Cement and Concrete Research 35 (2005) 2066 – 2073 ..... of expansion are reported in Table 6. .... United States Environmental Protection Agency, 1994.
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Jan 23, 2006 ... Keywords Steel tied arch construction of concrete problems ... be more testing several varieties of concrete expansion agent deal with the late ... China's major use of U-type expansive agent, compound expanders and alunite ...
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www.mineralszone.com/minerals/vermiculite.html
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With an expansion below 10 times the original volume, vermiculite is considered of low grade. The History Says It is believed that the mineral, now known as ...
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