Patent ID: 6769216
Filing Date: 2004-08-03
Classification: E02D,E04B,E04G

Abstract:
A process of waterproofing an expansion slit located between two cement concrete surfaces, comprising the steps of:(a) grounding and smoothing said two cement concrete surfaces located at two sides of said expansion slit; (b) paving a first layer of synthetic asphalt on said cement concrete surfaces; (c) heating said first layer of synthetic asphalt to a molten state that permeates into capillary pores of said cement concrete surfaces; (d) attaching a first layer of waterproof plastic cloth on said first layer of synthetic asphalt such that a first expansion space is provided; (e) paving a second layer of hot molten synthetic asphalt on said first layer of waterproof plastic cloth so as to securely hold said first layer of waterproof plastic cloth between said first and second layers of synthetic asphalt; (f) attaching a second layer of waterproof plastic cloth on said second layer of synthetic asphalt; (g) paving a third layer of synthetic asphalt on said second layer of waterproof plastic cloth so as to hold said second layer of waterproof plastic cloth securely between said second and third layers synthetic asphalt such that a second expansion space is provided, wherein said synthetic asphalt of said first, second and third layers of synthetic asphalt is a mixture of a straight asphalt and a blown asphalt adapted for adhering waterproof cloth and construction material and being resilient and repellent to water and resistant to corrosion; (h) providing in two sides of an expansion slit with a plurality of waterproof bricks attached thereto for enhancing a waterproof effect and for pressing said first and second layers of waterproof plastic cloth; and (i) filling interstices of said waterproof bricks with sand and fine pebbles.