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通过对C50、C60、C70级负温高强砼在-15℃条件下不同行为状态中的强度发展规律研究，证明了不掺防冻剂的高强砼所遵从的负温下强度规律与普通砼相同，而掺防冻剂的高强砼其掺量仅达普通砼的1／3时即达到普通砼在同一冻结温度下的强度增长速度，故冬施高强砼中应掺入必要的复合防冻剂。
By studying the strength development law of C50, C60, and C70 negative temperature high-strength crucibles under different behavioral conditions at -15°C, it is proved that the strength law at negative temperatures followed by high-strength crucibles not containing antifreeze is the same as that of ordinary crucibles. The high-strength antimony-doped antimony, whose content is only 1/3 that of the common antimony, reaches the strength of the common antimony at the same freezing temperature. Therefore, the necessary composite antifreeze agent should be incorporated into the high-strength antimony.