Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A Quick-Setting Silico-Phosphate Cement
The purpose of the study was to develop a very rapid-patching cement for repair of concrete pavements and bridge decks. Quick-setting cements were developed with some properties significantly better than those of Type III Portland cement. These silico-phosphate cements were prepared from a naturally occurring calcium silicate, wollastonite, and phosphoric acid containint dissolved metal ions, such as Zn, Al, etc. The cement-to-aggregate ratio, the liquid-to-powder ratio, and the types and quantities of useful additives to the acid were investigated. Setting times for hardening ranged from minutes to hours and were controllable depending on formulation and processing. Compressive strengths developed in hours using quick-setting cements exceeded those obtained after days of curing with conventional cements. The reproducibility in fabricating mechanically mixed cement samples in the laboratory was determined. The effects of various curing conditions on strength properties were noted. Linear expansion and resistance to freeze-thaw cycling and to various environments were measured. (Author)
A Quick-Setting Silico-Phosphate Cement
The purpose of the study was to develop a very rapid-patching cement for repair of concrete pavements and bridge decks. Quick-setting cements were developed with some properties significantly better than those of Type III Portland cement. These silico-phosphate cements were prepared from a naturally occurring calcium silicate, wollastonite, and phosphoric acid containint dissolved metal ions, such as Zn, Al, etc. The cement-to-aggregate ratio, the liquid-to-powder ratio, and the types and quantities of useful additives to the acid were investigated. Setting times for hardening ranged from minutes to hours and were controllable depending on formulation and processing. Compressive strengths developed in hours using quick-setting cements exceeded those obtained after days of curing with conventional cements. The reproducibility in fabricating mechanically mixed cement samples in the laboratory was determined. The effects of various curing conditions on strength properties were noted. Linear expansion and resistance to freeze-thaw cycling and to various environments were measured. (Author)
A Quick-Setting Silico-Phosphate Cement
R. J. Janowiecki (Autor:in) / C. E. Semler (Autor:in)
1971
144 pages
Report
Keine Angabe
Englisch
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