Fiber reinforced geopolymer treated soft clay - An innovative and sustainable alternative for soil stabilization

被引：23

作者：

Chowdary, Bhavita ^{[1
]}

Ramanamurty, V ^{[1
]}

Pillai, Rakesh J. ^{[2
]}

机构：

[1] Natl Inst Technol Warangal, Dept Civil Engn, Warangal 506004, Telangana, India

[2] Indian Inst Technol Palakkad, Dept Civil Engn, Palakkad 678557, Kerala, India

来源：

MATERIALS TODAY-PROCEEDINGS | 2020年 / 32卷

关键词：

GGBS; Geopolymer; Unconfined compressive strength; Wetting-drying cycles; Polypropylene fibers; STRENGTH DEVELOPMENT; FLY-ASH; SLAG; IMPROVEMENT; TECHNOLOGY; CEMENT;

D O I：

10.1016/j.matpr.2020.03.574

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Deep Soil Mixing (DSM) is one of the effective methods widely used in the stabilization of soft and weak soils. For DSM applications, an industrial by-product based geopolymer binder was recommended as a sustainable alternative to cement. The addition of fibers to treated soil arrests crack propagation thus further improving its strength and ductility. In the present investigation, ground granulated blast furnace slag (GGBS) reacted with 8 M NaOH was used as a geopolymer (GP) binder to treat soft clay at high water content. Polypropylene (PP) fibers of 12 mm length were used as reinforcement in 0.25 to 1.0% proportions. Unconfined compressive strength (UCS) and durability (wetting - drying) tests were conducted on the prepared specimens. From the study, the advantages of fiber inclusion in improving the mechanical behaviour and durability of the treated soft soil were highlighted. The GP treated soil mixes with binder content of 30% and Activator/Binder (A/B) ratio of 0.75 reinforced with 1% PP fibers by weight have exhibited superior strength and durability characteristics and thus can be used as sustainable alternative to the traditional binders in deep soil mixing applications. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页码：777 / 781

页数：5

共 26 条

[1] Evaluation of fly ash- and slag-based geopolymers for the improvement of a soft marine clay by deep soil mixing [J].

Arulrajah, Arul ;

Yaghoubi, Mohammadjavad ;

Disfani, Mahdi Miri ;

Horpibulsuk, Suksun ;

Bo, Myint Win ;

Leong, Melvyn .

SOILS AND FOUNDATIONS, 2018, 58 (06) :1358-1370

[2] The effect of fiber properties on high performance alkali-activated slag/silica fume mortars [J].

Aydin, Serdar ;

Baradan, Bulent .

COMPOSITES PART B-ENGINEERING, 2013, 45 (01) :63-69

[3]

Broms B.B., 1991, Foundation Engineering Handbook, VSecond, P833, DOI DOI 10.1007/978-1-4757-5271-7_24

[4]

Chai J.C, 2011, DEFORMATION ANAL SOF, V18

[5] Microcracking and strength development of alkali activated slag concrete [J].

Collins, F ;

Sanjayan, JG .

CEMENT & CONCRETE COMPOSITES, 2001, 23 (4-5) :345-352

[6] Deep soft soil improvement by alkaline activation [J].

Cristelo, Nuno ;

Glendinning, Stephanie ;

Teixeira Pinto, Amandio .

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GROUND IMPROVEMENT, 2011, 164 (02) :73-82

[7]

Davidovist J., 1985, US Patent, Patent No. [4509985, 4,509,985]

[8] Geopolymer technology:: the current state of the art [J].

Duxson, P. ;

Fernandez-Jimenez, A. ;

Provis, J. L. ;

Lukey, G. C. ;

Palomo, A. ;

van Deventer, J. S. J. .

JOURNAL OF MATERIALS SCIENCE, 2007, 42 (09) :2917-2933

[9] SOIL RANDOMLY REINFORCED WITH FIBERS [J].

FREITAG, DR .

JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 1986, 112 (08) :823-826

[10]

Gaspard K., 2003, P 82 TRANSP RES BOAR

← 1 2 3 →