As we all know, the use of phosphorous slag powder(PSP)as admixture can lead to some adverse effects in concrete performance, such as low early strength and prolonged setting times.

磷渣粉作为掺合料对混凝土性能产生一些不利的影响，一是早期强度低，二是凝结时间长。

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This paper studied the setting and hardening property and strength property of concrete prepared by fast setting and hardening cement and retarding admixture.

研究了使用双快水泥和缓凝剂配制混凝土的凝结硬化性能和强度性能。

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To ensure that in the initial setting of concrete before the row on the lower bond, so as to safeguard the overall strength of concrete.

保证混凝土在初凝之前，上下层的连续粘接，以保障混凝土的整体强度。

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