A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Performance Studies of Synthetic Aggregate Concrete
The purpose of the report is to summarize the result to date on the development of a recommended synthetic aggregate classification system and the performance standards for synthetic aggregate concrete. It reports results of tests on the physical durability, chemical durability, and preliminary tests on mechanical durability of portland cement concrete. Some of the conclusions reported are as follows: (1) The rates at which different lightweight coarse aggregates become saturated varies, (2) The resistance of concrete to freezing and thawing (ASTM C 290) was influenced by the degree of saturation of coarse aggregates at time of mixing, (3) The critical degree of saturation of coarse aggregate at time of mixing was found to be about 0.25. No field test has been developed to determine degree of saturation. A test for determining clay materials in lightweight aggregates needs to be developed. Quantitative tests for decomposable sulfides should be required. Preliminary tests indicate that when the aggregate is exposed, synthetic aggregate concrete abrades more than natural gravel concrete. When aggregate is exposed, the cement content does not significantly influence the abrasion loss. The moisture in the concrete at time of test affects abrasion loss. (BPR-abstract)
Performance Studies of Synthetic Aggregate Concrete
The purpose of the report is to summarize the result to date on the development of a recommended synthetic aggregate classification system and the performance standards for synthetic aggregate concrete. It reports results of tests on the physical durability, chemical durability, and preliminary tests on mechanical durability of portland cement concrete. Some of the conclusions reported are as follows: (1) The rates at which different lightweight coarse aggregates become saturated varies, (2) The resistance of concrete to freezing and thawing (ASTM C 290) was influenced by the degree of saturation of coarse aggregates at time of mixing, (3) The critical degree of saturation of coarse aggregate at time of mixing was found to be about 0.25. No field test has been developed to determine degree of saturation. A test for determining clay materials in lightweight aggregates needs to be developed. Quantitative tests for decomposable sulfides should be required. Preliminary tests indicate that when the aggregate is exposed, synthetic aggregate concrete abrades more than natural gravel concrete. When aggregate is exposed, the cement content does not significantly influence the abrasion loss. The moisture in the concrete at time of test affects abrasion loss. (BPR-abstract)
Performance Studies of Synthetic Aggregate Concrete
E. Buth (author) / H. R. Blank (author) / R. G. McKeen (author)
1968
37 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Concrete , Classification , Performance(Engineering) , Standards , Cements , Physical properties , Chemical properties , Absorption , Porosity , Mixtures , Wetting , Freezing , Impurities , Clay , Sulfides , Chemical reactions , Organic materials , Moisture , Degradation , Test methods , Analysis of variance , Pavements , Wear resistance , Concrete durability , Synthetic aggregate concretes , Portland cements , Thawing , Abrasion , Aggregates
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