hcfa

The results of 9 piglets of HCFA and RT PCR were positive .

直接免疫荧光抗体试验和RT-PCR检测，9头均为阳性。

When taken in concrete with proper quantity , HCFA can compensate the drying shrinkage of concrete , and accordingly reduce the cracking risk of concrete .

混凝土中掺加适量高钙灰，对于混凝土的干燥收缩有补偿作用，可降低其开裂风险。

However , the average pore radius decreases remarkably with increase in the age , and therefore the reduction of compressive strength caused by HCFA becomes much less .

然而，随着龄期增长，浆体平均孔半径显著降低，抗压强度降得更小；

The essential performance of high calcium fly ash ( HCFA ) was summarized , and correlate researches of HCFA were reviewed together with a great deal of examples in this paper .

概述了高钙粉煤灰的基本性能，指出高钙粉煤灰中游离氧化钙带来的安定性问题和高钙粉煤灰的掺量仍是目前研究的重点；

The Portland cement and high calcium fly ash samples ( shortened form P.C. and HCFA ) which have different particle size distributions were mixed in a proportion of 50:50 % . The mortar strength of HCFA cement in 3 and 28 days were tested .

本文将不同颗粒群分布的高钙灰、水泥按5：5比例混合，制成高钙灰水泥，测其3d、28d胶砂抗折、抗压强度。