Question
In: Civil Engineering
Which ASTM cement is most appropriate for the following construction applications? What types of mineral and/or...
Which ASTM cement is most appropriate for the following construction applications? What types of mineral and/or chemical admixtures could be used for each application? Give reasons for your choices.
- Construction of an exposed aggregate concrete wall.
Solutions
Expert Solution
Since, the aggregate bond should be formed for exposed aggregate concrete finish, rich cement mixes should be used. For example, Portland Cement mix Type II or V.
The recommended mix for construction of an exposed aggregate concrete wall are-
The typical proportions used for exposed aggregate concrete are 15 percent cement, 15 percent water, and a 70 percent mix of aggregate and sand.
The most popular decorative aggregates are richly colored natural mineral stones such as basalts, granite, quartz, or limestone.Also, manufactured materials such as recycled colored glass. Even seashells and other interesting objects can be used.
The admixtures used for the exposed concrete aggregate are chemical retarders.Exposed aggregate is done by using a chemical retarder on the surface of the concrete during its placement. The retarder keeps the cement on the surface from hardening and then allows the unhardened cement to be sprayed or washed of.
Ally Wells answered 9 months agoRelated Solutions
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