to find out experimentally the optimum percentage of calcium chloride which can give early strength development generally in hot weather and also to find out its effect on setting time, rate of strength development of concrete and mortar as well as its effect on corrosion of steel and shrinkage....
EFFECT OF CEMENT TEMPERATURE WAS FOUND UNIMPORTANT, EXCEPT AS IT AFFECTED CONCRETE TEMPERATURE AFTER MIXING. MORE AIR-ENTRAINING AGENT WAS REQUIRED FOR A GIVEN AIR CONTENT AS CONCRETE TEMPERATURE INCREASED AND SLUMP DECREASED. /PCA/ 展开 关键词: Air entraining agents Calcium chloride Compressive ...
EFFECTS OF CALCIUM CHLORIDE ON DYNAMIC MODULUS OF ELASTICITY OF CONCRETE TEST SPECIMENS AN INVESTIGATION OF CONCRETES MADE WITH VARIOUS BRANDS OF NORMAL, WHITE AND HIGH-EARLY-STRENGTH PORTLAND CEMENTS, CURED IN VARIOUS WAYS, OVER PERIODS UP TO... RC Valore,JC Yates - 《Highway Research Board Pr...
Calcium chloride, calcium sulfate, sodium sulfate, and sucrose at dosages of 1wt% and 2wt% of fly ash were selected as admixtures based on concrete knowledge to improve the properties of the geopolymer. The setting time, compressive strength, and degree of reaction were recorded, and the ...
It is generally recognized that cracks provide easy access to ingress of chlorides in concrete and hence, the initiation of corrosion of steel in cracked concrete occurs at early stage. However, wide variety of results on the effect of crack widths on co
Three commercially available corrosion inhibitors—calcium nitrite, a solution of amines and esters, and an alkenyl-substitutedsuccinic acid salt—are evaluated in conjunction with conventional reinforcement in concrete based on corrosion rate, metalloss, the critical chloride corrosion threshold (CCCT), po...
Effect of fine fly ash and calcium hydroxide on air void structure in very-early-strength latex-modified concrete Very-early-strength latex-modified concrete (VES-LMC) was developed for rapid repairs of distresses in concrete bridge decks and pavements, with the emphas... P Choi,SI Jeon,KK ...
As a test results, in case of the use chloride-containing deicier in area that concrete structures has subjected to freez-thaw reaction in winter season, it showed that mixed deicing chemicals with optimum ratio has desirable method than use one deicing chemicals when is consider to deicing ...
Influence of Polyols as a Co-Stabilizer on Stabilization Efficiency of Calcium/Zinc Stabilizers to PVC In order to prepare the innocuity polyvinyl chloride (PVC) products, the calcium/zinc stearate was used as the thermal stabilizer of PVC and the polyols we... JG Gao,XQ Liu,JB Yang,... ...
while others may have a glassy appearance, depending on composition of the contaminants and the conditions of both heating and cooling36. FA is a specialty SCM that is utilized in matrix37,38. The accumulation of FA has been shown to enhance the flow of concrete39, decrease thermal fracture ...