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，并未呈現明顯下滑現象。對于建筑行業來講，小型攪拌機攪拌砂漿水泥在炎熱夏季使用，攪拌砂漿水泥混凝土這些建筑材料應該注意什么？高溫季節施工應該注意哪些問題？

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?

進入6月份后，每日高氣溫平均可達到30度及以上時混凝土進人高溫施工季節。

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

高溫施工對混凝土有以下影響：

High temperature construction has the following effects on concrete:

1)夏季明顯特點：氣溫高，日照強導致小型攪拌機攪拌砂漿水泥混凝土水分蒸發速度較正常蒸發速度快數倍，水分過早蒸發容易造成混凝土未未使用之前出現干縮裂紋，出現干縮裂紋的混凝土必然出現使用問題，將不能滿足正?；炷潦褂靡?；

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)高溫環境下作業，小型混凝土攪拌機攪拌砂漿水泥混凝土更容易出現坍落度損失大現象，塌落現象造成施工操作不便，并且會使得小型攪拌機攪拌砂漿水泥混凝土內部出現蜂窩、孔洞以及冷縫等質量問題；

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，水泥砂漿混凝土水化速度加快，如若大面積大量使用混凝土則容易造成混凝土內部與混凝土施工表面溫差過大，從而導致出現縫隙，除此以外高溫暴曬，夏季晝夜溫差大等都會增加砂漿水泥塑性裂縫、干縮裂縫。

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.