With the advent of summer, the construction industry has ushered in another wave of new tests. Unremitting self-improvement after the victory of COVID-19, our industries and industries have not been seriously affected. The arrival of hot summer means the arrival of off-season for most industries.

但今年的夏季由于前半年延期，并未呈现明显下滑现象。对于建筑行业来讲，小型搅拌机搅拌砂浆水泥在炎热夏季使用，搅拌砂浆水泥混凝土这些建筑材料应该注意什么？高温季节施工应该注意哪些问题？

However, this summer did not show a significant decline due to the delay in the first half of the year. For the construction industry, small mixers are used to mix mortar and cement in hot summer. What should be paid attention to when mixing mortar and cement concrete? What problems should be paid attention to in construction in high temperature season?

进入6月份后，每日高气温平均可达到30度及以上时混凝土进人高温施工季节。

After entering June, when the average daily high temperature can reach 30 degrees or above, the concrete enters the high-temperature construction season.

高温施工对混凝土有以下影响：

High temperature construction has the following effects on concrete:

1)夏季明显特点：气温高，日照强导致小型搅拌机搅拌砂浆水泥混凝土水分蒸发速度较正常蒸发速度快数倍，水分过早蒸发容易造成混凝土未未使用之前出现干缩裂纹，出现干缩裂纹的混凝土必然出现使用问题，将不能满足正常混凝土使用要求；

1) Obvious characteristics in summer: high temperature and strong sunshine lead to the water evaporation rate of cement concrete mixed with mortar by small mixer several times faster than the normal evaporation rate. Premature water evaporation is easy to cause dry shrinkage cracks before concrete is used. The concrete with dry shrinkage cracks will inevitably have problems in use and will not meet the requirements of normal concrete use;

2)高温环境下作业，小型混凝土搅拌机搅拌砂浆水泥混凝土更容易出现坍落度损失大现象，塌落现象造成施工操作不便，并且会使得小型搅拌机搅拌砂浆水泥混凝土内部出现蜂窝、孔洞以及冷缝等质量问题；

2) When working in high temperature environment, small concrete mixer mixing mortar cement concrete is more likely to have large slump loss, which will cause inconvenient construction operation and quality problems such as honeycomb, hole and cold joint in mortar cement concrete mixed by small concrete mixer;

3)夏季施工，水泥砂浆混凝土水化速度加快，如若大面积大量使用混凝土则容易造成混凝土内部与混凝土施工表面温差过大，从而导致出现缝隙，除此以外高温暴晒，夏季昼夜温差大等都会增加砂浆水泥塑性裂缝、干缩裂缝。

3) During construction in summer, the hydration speed of cement mortar concrete is accelerated. If a large amount of concrete is used in a large area, it is easy to cause excessive temperature difference between the concrete interior and the concrete construction surface, resulting in cracks. In addition, high temperature exposure and large temperature difference between day and night in summer will increase the plastic cracks and dry shrinkage cracks of mortar cement.