A modified asphalt self-adhesive coating material and its preparation method and self-adhesive asphalt waterproof membrane

Abstract

The invention discloses a modified asphalt self-adhesive coating material, a preparation method thereof and a self-adhesive asphalt waterproof coiled material. The modified asphalt self-adhesive coating material includes the following components: 20wt%-40wt% of the first petroleum asphalt, 15wt%-30wt% of the second petroleum asphalt, 5wt%-10wt% of SBR modifier, 5wt% of SBS modifier ‑10wt%, tackifying resin 3wt%‑6wt%, pyrolytic carbon black 2wt%‑4wt%, polyvinyl alcohol 1wt%‑5wt%, boric acid 1wt%‑5wt%, filler 20wt%‑30wt%. The peeling strength between the self-adhesive asphalt waterproofing membrane and the post-cast concrete, and the peeling strength between the coil and the coil at the overlapping edge of the present invention are high, and there is no gap between the waterproof layer and the post-cast concrete after construction, eliminating the hidden danger of water channeling between layers , effectively improving the reliability of the waterproof system.

Description

technical field [0001] The invention belongs to the field of building waterproof materials, and more specifically relates to a modified asphalt self-adhesive coating material, a preparation method thereof and a self-adhesive asphalt waterproof coiled material. Background technique [0002] With the development of modern building waterproofing and the construction tends to be faster and more convenient, the proportion of pre-laid waterproofing membranes in the waterproofing market continues to increase. The pre-laid waterproof membrane is composed of the main material, self-adhesive, surface anti-adhesion (reduction) protective layer (except for the overlapping area of ​​the membrane), and isolation material (when necessary), and is bonded to the post-cast concrete to prevent adhesion Waterproof membrane with surface channeling. Since it can be fully glued to the main structure after construction, the waterproof effect can be improved. No adhesive or heating is required dur...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned modified asphalt self-adhesive layer formula provides a certain high-temperature and low-temperature performance, but the material is in contact with the post-cast concrete during construction, and the concrete hydration releases heat, and the softener in the modified asphalt self-adhesive layer formula is precipitated in a hot environment , the stripping performance between the coiled material and the post-cast concrete is poor, and it cannot meet the index requirements in the product standard at all, and the peeling strength value of the coiled material and the coiled material at the lap joint of the waterproof coiled material is also relatively small, and the lapped joint is easy after construction. Peel off to form a water channel, which cannot meet the construction requirements

[0006] On the whole, the above patent does not fully consider the performance change of the material when it is heated. Moreover, the patent does not propose the mechanism of action of the pre-applied waterproof membrane, and does not solve the water channeling caused by the weak lap joints of the pre-applied waterproof membrane. And the problem of water channeling caused by the small peeling strength of the pre-paved waterproof membrane and the post-cast concrete after the reaction and consolidation

Images