Waste crumb-rubber augmented masonry blocks

Patent metadata

Field	Value
Publication number	US-9382160-B2
Application number	US-201414253978-A
Country	US
Kind code	B2
Filing date	Apr 16, 2014
Priority date	Apr 16, 2014
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

This invention relates to the development of Crumb Rubber augmented masonry blocks. Crumb rubber is extracted from scrape tires after being processed and then mixed in specified percentages with concrete, cement and water. In the present disclosure sand, which is used in the formation of conventional blocks, is replaced with crumb rubber to produce a sand-free masonry block containing crumb rubber. The developed crumb rubber masonry blocks satisfied the ASTM non-load bearing requirements in addition to satisfying the water absorption test.

First claim

The invention claimed is:

1. A sand-free masonry block, consisting of:
a homogeneously dispersed mixture of cement, water, and crumb rubber.

2. The masonry block of claim 1 wherein the mesh size of the crumb rubber is 65-100 mesh.

3. The masonry block of claim 1 wherein the masonry block weighs 16.0-16.5 kg.

4. The masonry block of claim 1 wherein the masonry block has a water absorption of 6.20-6.30%.

5. The masonry block of claim 1 , wherein the crumb rubber is silanized crumb rubber obtained by treating crumb rubber with a silanizing agent selected from the group consisting of an aminosilane, a glycidoxysilane, and a mercaptosilane.

6. The masonry block of claim 5 , wherein the aminosilane is selected from the group consisting of (3-aminopropyl)-diethoxy-methylsilane, (3-aminopropyl)-dimethyl-ethoxysilane, and (3-aminopropyl)-trimethoxysilane.

7. The masonry block of claim 5 , wherein the glycidoxysilane is (3-glycidoxypropyl)-dimethyl-ethoxysilane.

8. The masonry block of claim 5 , wherein the mercaptosilane is (3-mercaptopropyl)-trimethoxysilane or (3-mercaptopropyl)-methyl-dimethoxysilane.

9. The masonry block of claim 1 , which has a wt. % of cement ranging from 20 to 40%, relative to the total weight of the masonry block.

10. The masonry block of claim 1 , which has a wt. % of water ranging from 1 to 15%, relative to the total weight of the masonry block.

11. The masonry block of claim 1 , which has a wt. % of crumb rubber ranging from 5 to 25%, relative to the total weight of the masonry block.

12. The masonry block of claim 1 , which has a wt. % of crumb rubber ranging from 15 to 25%, relative to the total weight of the masonry block.

13. The masonry block of claim 1 , which has a wt. % of crumb rubber ranging from 12 to 18%, relative to the total weight of the masonry block.

14. The masonry block of claim 1 , which has a wt. % of crumb rubber ranging from 5 to 15%, relative to the total weight of the masonry block.

15. The masonry block of claim 1 , which has a wt. % of crumb rubber ranging from 5 to 10%, relative to the total weight of the masonry block.

16. A sand-free masonry block, comprising:
a homogeneously dispersed mixture of cement, water, and crumb rubber,
wherein the crumb rubber is silanized crumb rubber obtained by treating crumb rubber with a silanizing agent selected from the group consisting of an aminosilane, a glycidoxysilane, and a mercaptosilane, and
wherein the silanized crumb rubber is the only aggregate material present.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Al-Aqeeli Nasser M
• Assehdi Homoud M

Classifications

• C04B28/02 Primary

  containing hydraulic cements other than calcium sulfates · CPC title

• C04B24/42

  Organo-silicon compounds · CPC title

• C04B2111/1056

  Silica-free or very low silica-content materials · CPC title

• C04B18/22

  Rubber {, e.g. ground waste tires} · CPC title

• Y02W30/96

  Cross-Sectional Technologies · mapped topic