In recent years, with the development of municipal construction, large municipal engineering facilities such as large-span bridges, urban overpasses, tunnels, water plants and sewage treatment plants have been emerging, and the durability requirements of concrete have become higher and higher. The cracking of concrete caused by temperature difference shrinkage and dry shrinkage has received widespread attention. Therefore, our company has purposefully developed a micro-expansion high-efficiency anti-crack waterproof agent product.

The micro-expansion high-efficiency anti-crack waterproof agent is mainly composed of the expansion waterproof component and the airtight anti-corrosion component. It has the characteristics of low alkali content, good waterproof and anti-seepage effect, good durability of concrete, and has the micro-expansion performance, which can compensate the shrinkage of concrete and prevent concrete cracking. It is an ideal rigid waterproof material. There are two types of micro-expansion high-efficiency anti-crack waterproof agent: SL is ordinary type and SL-H is high-efficiency type.

Main technical characteristics

1. Appearance: This product is gray white powder.

2. The chemical property is stable and does not cause corrosion damage to the reinforcement in the concrete.

3. Low alkali content will not cause alkali aggregate reaction.

4. It can reduce the hydration heat of concrete.

5. It can make the concrete produce micro-expansion, establish pre-compression stress in the concrete structure, and improve the compactness, impermeability and durability of the concrete.

6. The anti-crack and anti-seepage effect is good, and the impermeability grade of concrete can reach above P30.

7. The shrinkage of concrete is small, which can reduce or prevent the cracking of concrete.

8. Other performance indicators meet the quality requirements of JC474-2008 "Mortar and Concrete Waterproof Agent" standard.

Main purpose

1、适用于大跨度桥梁、城市道路、城市立交、隧道等市政、公路的混凝土工程。

2、适用于地下工程、人防工程、水电大坝、隧道、蓄水池、地下室等建筑防水工程。

3、适用于结构自防水工程、大体积混凝土工程和超长结构的无缝施工工程。

使用及注意事项

1、SL常规掺量为胶凝材料重量的8%～10%，SL-H常规掺量为胶凝材料重量的6%～8%，具体掺量根据混凝土强度等级、现场材料和施工条件等经试验确定。

2、外加剂的用量精度误差不得大于1.0%。

3、本产品直接掺入砂浆或混凝土中使用，不能溶于水中使用。

4、本产品可配制成防水砂浆或防水混凝土，防水砂浆要压实，防水混凝土要振捣密实，不得出现蜂窝麻面。抹面砂浆要求至少潮湿养护3天，防水混凝土全湿养护至少10天。

5、本产品掺入混凝土中，应比常规混凝土的搅拌时间延长30秒~60秒。

6、包装采用塑料编织袋，每袋重50kg±1kg；也可提供散装。在运输及贮存时，应注意防雨、防水及防潮。

7、在不受潮条件下，产品保质期为12个月，过期产品应先进行混凝土性能试验后才能使用。

8、用户在使用本产品前，应先进行混凝土适应性试验。