What is the difference between bentonite and PVC waterstop

Bentonite waterstop and expansion waterstop are commonly used waterproof materials and play an irreplaceable role in waterproofing engineering. However, many people often confuse these two materials. This article will compare these two types of waterstops from multiple aspects such as production materials, applicable scenarios, and performance characteristics to help readers understand their differences and usage methods.

1. Materials for production

The main raw materials for bentonite waterstop are bentonite and some auxiliary materials. This material is an impermeable clay material with strong moisture absorption and expansion properties. To make a bentonite waterstop, it is necessary to mix bentonite and wood fiber materials evenly, and then add water, stir, and squeeze them into shape.

The main materials for making expansion waterstops are rubber, expandable fillers, etc. This material has strong elasticity and sealing properties, and can automatically expand and fill gaps without being affected by external forces, with excellent waterproof effect. To make an expandable water stop strip, it is necessary to mix rubber and expandable filler in a certain proportion and place them in a mold for pressure molding.

2. Applicable occasions

Bentonite waterstop strip is suitable for sealing and sealing expansion joints, through joints, and deformation joints in concrete structures. It can also be used for waterproofing in tunnels, water conservancy, embankments, and other engineering projects. Expansion sealing strips are suitable for sealing expansion joints and seams in various building structures; Especially suitable for waterproofing in underground engineering such as subways, bridges, tunnels, etc.

3. Performance characteristics

Bentonite waterstop has the advantages of water absorption expansion, water sealing, good injectability, good weather resistance, and reusability. Expansion waterstop has the characteristics of good sealing performance, stable expansion performance, good waterproof effect, long service life, and wide range of use.

4. Summary

Bentonite waterstop and expansion waterstop, although both are waterproof materials, have different materials and usage scenarios. Bentonite waterstop strip is suitable for sealing and sealing expansion joints, through joints, and deformation joints in concrete structures, while expansion waterstop strip is suitable for sealing expansion joints and joints in various building structures, and its waterproof effect is very obvious.