Method for enhancing strength and durability of weak soils

Patent metadata

Field	Value
Publication number	US-9499742-B2
Application number	US-201414572609-A
Country	US
Kind code	B2
Filing date	Dec 16, 2014
Priority date	Dec 16, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

The method for enhancing strength and durability of weak soils includes the steps of selecting a weak soil, such as marl or dune sand, mixing the weak soil with 2% cement by weight and between 5% and 30% by weight of Electric Arc Furnace Dust (EAFD) to form a dry mixture, mixing the dry mixture with water to form a substantially homogenized mixture, and curing the homogenized mixture, wherein curing can include the step of sealing the homogenized mixture in an environment having a temperature between 19° C. and 25° C., inclusive, for seven days.

First claim

We claim:

1. A method for enhancing strength and durability of weak soils, consisting of the steps of:
selecting a weak soil;
mixing the weak soil with cement and Electric Arc Furnace Dust (EAFD) to form a dry mixture, the dry mixture consisting of the weak soil, the cement and the EAFD, the cement is in an amount of 2 wt % of the dry soil and the EAFD is in the amount of between 5 wt % and 30 wt % of the dry soil;
mixing the dry mixture with water to form a substantially homogenized mixture; and
curing the homogenized mixture.

2. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the weak soil comprises marl.

3. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the weak soil comprises non-plastic marl.

4. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the weak soil comprises dune sand.

5. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the cement comprises Portland cement.

6. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the EAFD is in an amount of 20 wt % of the dry soil, whereby the enhanced weak soil is suitable for use as a sub-base for asphalt pavement.

7. The method for enhancing strength and durability of weak soils according to claim 1 , wherein the EAFD is in an amount of 30 wt % of the dry soil, whereby the enhanced weak soil is suitable for use as a sub-base for concrete pavement.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• Al-Amoudi Omar Saeed M Baghabra
• Al-Homidy Abdullah Ahmed Khaled
• Maslehuddin Mohammed
• Saleh Tawfik Abdo

Classifications

• E01C3/04

  Foundations produced by soil stabilisation {(soil stabilisation for road building in general E01C7/36)} · CPC title

• C09K17/10 Primary

  Cements, e.g. Portland cement · CPC title