The curing time of concrete shall comply with the following provisions:

1）采用硅酸鹽水泥、普通硅酸鹽水泥或礦渣硅酸鹽水泥配制的混凝土，不應少于7d；采用其他品種水泥時，養護時間應根據水泥性能確定；大型混凝土攪拌機

1) The concrete prepared with Portland cement, ordinary portland cement or slag Portland cement shall not be less than 7d; When other types of cement are used, the curing time shall be determined according to the cement performance; Large concrete mixer

2）采用緩凝型外加劑、大摻量礦物摻合料配制的混凝土，不應少于14d；大型混凝土攪拌機，抗滲混凝土、強度等級C60及以上的混凝土，不應少于14d；后澆帶混凝土的養護時間不應少于14d；大型混凝土攪拌機，

2) The concrete prepared with retarding admixture and large amount of mineral admixture shall not be less than 14d; Large concrete mixer, impermeable concrete and concrete with strength grade C60 and above shall not be less than 14d; The curing time of post cast strip concrete shall not be less than 14d; Large concrete mixer,

3）地下室底層墻、柱和上部結構首層墻、柱宜適當增加養護時間；基礎大體積混凝土養護時間應根據施工方案確定。

3) The curing time of basement bottom wall and column and superstructure first floor wall and column should be appropriately increased; The curing time of foundation mass concrete shall be determined according to the construction scheme.

2.灑水養護應符合下列規定：

2. Watering and curing shall meet the following requirements:

灑水養護宜在混凝土裸露表面覆蓋麻袋或草簾后進行，也可采用直接灑水、蓄水等養護方式；大型混凝土攪拌機，灑水養護應保證商品混凝土處于濕潤狀態；當日低溫度低于5℃時，不應采用灑水養護。

Watering maintenance should be carried out after the exposed surface of concrete is covered with gunny bags or straw curtains, or direct watering, water storage and other maintenance methods can be adopted; For large concrete mixer, watering and curing shall ensure that the commercial concrete is wet; When the low temperature of the day is lower than 5 ℃, watering shall not be used for curing.

3.覆蓋養護應符合下列規定：

3. Covering and curing shall meet the following requirements:

1）覆蓋養護宜在混凝土裸露表面覆蓋塑料薄膜、塑料薄膜加麻袋、塑料薄膜加草簾進行；

1) Covering and curing should be carried out by covering the exposed surface of concrete with plastic film, plastic film plus gunny bag and plastic film plus straw curtain;

2）大型混凝土攪拌機，塑料薄膜應緊貼混凝土裸露表面，塑料薄膜內應保持有凝結水；

2) For large concrete mixer, the plastic film shall be close to the exposed surface of concrete, and there shall be condensate in the plastic film;

3）覆蓋物應嚴密，覆蓋物的層數應按施工方案確定。

3) The covering shall be tight, and the number of layers of the covering shall be determined according to the construction scheme.

4.噴涂養護劑養護應符合下列規定：

4. Spraying curing agent shall meet the following requirements:

1）應在混凝土裸露表面噴涂覆蓋致密的養護劑進行養護；

1) The exposed surface of concrete shall be sprayed with dense curing agent for curing;

2）養護劑應均勻噴涂在結構構件表面，不得漏噴；養護劑應具有可靠的保濕效果，保濕效果可通過試驗檢驗；

2) The curing agent shall be evenly sprayed on the surface of structural members without missing spraying; The curing agent shall have reliable moisturizing effect, and the moisturizing effect can be tested;

3）養護劑使用方法應符合產品說明書的有關要求。

3) The use method of curing agent shall comply with the relevant requirements of the product manual.

5.基礎大體積混凝土裸露表面應采用覆蓋養護方式：

5. The exposed surface of foundation mass concrete shall be covered and cured:

當混凝土表面以內40mm～80mm位置的溫度與環境溫度的差值小于25℃時，可結束覆蓋養護。覆蓋養護結束但尚未到達養護時間要求時，可采用灑水養護方式直至養護結束。

When the difference between the temperature within 40mm ~ 80mm of the concrete surface and the ambient temperature is less than 25 ℃, the covering curing can be ended. When the covering curing is completed but the curing time requirements have not been met, the watering curing method can be adopted until the curing is completed.

6.柱、墻混凝土養護方法應符合下列規定：

6. The curing method of column and wall concrete shall comply with the following provisions:

地下室底層和上部結構首層柱、墻混凝土帶模養護時間，不宜少于3d；帶模養護結束后可采用灑水養護方式繼續養護，必要時也可采用覆蓋養護或噴涂養護劑養護方式繼續養護；大型混凝土攪拌機，其他部位柱、墻混凝土可采用灑水養護；必要時，也可采用覆蓋養護或噴涂養護劑養護。

The curing time of concrete with formwork for the column and wall on the first floor of basement and superstructure shall not be less than 3D; After the completion of formwork curing, watering curing can be used to continue the curing. If necessary, covering curing or spraying curing agent can also be used to continue the curing; Large concrete mixer, column and wall concrete in other parts can be cured by watering; If necessary, it can also be cured by covering or spraying curing agent.

7.混凝土強度達到1.2N/mm2前，不得在其上踩踏、堆放荷載、安裝模板及支架。同條件養護試件的養護條件應與實體結構部位養護條件相同，并應采取措施妥善保管。大型混凝土攪拌機，施工現場應具備混凝土標準試件制作條件，并應設置標準試件養護室或養護箱。標準試件養護應符合國家現行有關標準的規定。

7. Before the concrete strength reaches 1.2n/mm2, it is not allowed to step on it, stack load, install formwork and support. The curing conditions of specimens cured under the same conditions shall be the same as those of solid structure parts, and measures shall be taken to keep them properly. For large-scale concrete mixer, the construction site shall have the conditions for making concrete standard specimens, and a standard specimen curing room or curing box shall be set. The curing of standard specimens shall comply with the provisions of relevant current national standards.