Pavement and composition therefor专利检索-橡胶沥青沥青沥青粘合剂粘合剂建筑材料专利检索查询-专利查询网

Pavement and composition therefor

阅读：629发布：2023-08-14

专利汇可以提供Pavement and composition therefor专利检索，专利查询，专利分析的服务。并且Pavement having an inner layer between a surface course and a base, and a composition therefor. The inner layer may comprise ground tire stock or other particulate vulcanized rubber together with sand or other fine material aggregate, and, as a binder, asphalt from an oil-in-water asphalt emulsion which may be about 65 percent asphalt. A typical composition may contain equal parts by volume of mineral aggregate and particulate vulcanized rubber, and asphalt emulsion in an amount of 20 to 40 percent of the total volume. The layer, which may be from about one-eighth to one-half inch in thickness, will serve to relieve strain in the surface course and to arrest cracking thereof, by virtue of its reduced elastic modulus. In addition, it will desirably fill cracks in the base, and protect the base.，下面是Pavement and composition therefor专利的具体信息内容。

权利要求

2. A pavement as in claim 1 wherein the inner layer comprises ground vulcanized rubber substantially 100 percent of which will pass a one-quarter inch screen at least half of which will be retained on a No. 8 screen, and substantially 0 percent of which will pass a No. 50 screen, and fine mineral aggregate substantially 100 percent of which will pass a No. 4 screen.

3. A pavement composition relieving strain and arresting cracks in pavements consisting essentially, by volume, of from 30 to 50 percent of ground vulcanized rubber, from 20 to 40 percent of fine mineral aggregate, and from 15 to 35 percent of residual asphaltic binder from an emulsion, and reacting visco-elastically when subjected to relatively low rates of strain and elastically when subjected to relatively high rates of strain, the ground vulcanized rubber being of a size such that substantially 100 percent thereof will pass a one-quarter inch screen, at least half of which will be retained on a one-eighth inch screen, and substantially none of which will pass a No. 50 screen.

4. A process for forming a pavement which comprises providing, between a base and a surface layer, a substantially continuous strain relieving layer by applying cold to the base, a composition consisting essentially, by volume, of from 30 to 50 parts of ground vulcanized rubbeR, from 20 to 40 parts of fine mineral aggregate, and from 30 to 70 parts of asphaltic emulsion containing from 15 to 35 parts of residual asphaltic binder, and reacting visco-elastically when subjected to relatively low rates of strain and elastically when subjected to relatively high rates of strain, the ground vulcanized rubber being of a size such that substantially 100% thereof will pass a one-quarter inch screen, at least half of which will be retained on a one-eighth inch screen, and substantially none of which will pass a No. 50 screen.

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