Sustainable pavement quality concrete containing ultra-high volume fly ash in the presence of a novel superplasticizer

被引:15
作者
Titiksh, Abhyuday [1 ]
Wanjari, Swapnil P. [1 ]
机构
[1] Visvesvaraya Natl Inst Technol, Dept Civil Engn, Nagpur, Maharashtra, India
关键词
Fly ash; Sustainable construction; Novel superplasticizer; NSP; Sand replacement; POLYCARBOXYLATE-BASED SUPERPLASTICIZERS; SIDE-CHAIN LENGTH; OIL FUEL ASH; MICROSTRUCTURAL ANALYSIS; WORKABILITY RETENTION; COMPRESSIVE STRENGTH; CHEMICAL-STRUCTURE; FRESH CONCRETE; SILICA FUME; RIVER SAND;
D O I
10.1016/j.cscm.2021.e00603
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The examination intends to foster a novel blend proportioning for pavement quality concrete (PQC) wherein fly ash (FA) is utilized as a total substitute to river sand (RS). The objective was to utilize FA in a lot higher extent than done in past investigations (more noteworthy than 500 kg/ m3). The equivalent was gotten by developing and incorporating a novel superplasticizer (NSP) viable with higher volumes of FA in the concrete blend. In such manner, macromonomers of (poly)ethylene glycol (PEG6000) were added to an industrially accessible high (poly)carboxylate ether (PCE) superplasticizer. This was done in order to increase the adsorption capability of the NSP on to the FA, consequently giving increased strength to the mix. The replacement of river sand with FA was done at 0, 25, 50, 75, and 100 % for M40 grade of concrete and subsequent to achieving the necessary flow in terms of concrete slump, the physio-mechanical properties were evaluated in terms of compressive, flexural and split tensile strengths. Durability studies were additionally carried out in terms of rapid chloride penetrability test (RCPT) and abrasion resistance, alongside microstructural examinations. The samples containing 100 % FA showed a noticeable increase in the 28-days compressive strength of 15 % when contrasted with the control blend. By and large, every one of the preliminaries displayed worthy strength properties according to the codal prerequisites of IS 456: 2000, empowering us to reason that total substitution of river sand in concrete with FA within the sight of NSPs is a maintainable option in contrast to the conventional mix design approach.
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页数:22
相关论文
共 94 条
[1]   Fly Ash-based Geopolymer Lightweight Concrete Using Foaming Agent [J].
Abdullah, Mohd Mustafa Al Bakri ;
Hussin, Kamarudin ;
Bnhussain, Mohamed ;
Ismail, Khairul Nizar ;
Yahya, Zarina ;
Razak, Rafiza Abdul .
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 2012, 13 (06) :7186-7198
[2]   Impact of replacement of natural river sand with geopolymer fly ash sand on hardened properties of concrete [J].
Agrawal, U. S. ;
Wanjari, S. P. ;
Naresh, D. N. .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 209 :499-507
[3]   Characteristic study of geopolymer fly ash sand as a replacement to natural river sand [J].
Agrawal, U. S. ;
Wanjari, S. P. ;
Naresh, D. N. .
CONSTRUCTION AND BUILDING MATERIALS, 2017, 150 :681-688
[4]   Thermal and pore structural characteristics of polymer-impregnated and superplasticized cement pastes [J].
Al-Noaimi, KK ;
El-Hosiny, FI ;
Abo-El-Enein, SA .
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2000, 61 (01) :173-180
[5]   Compatibility between polycarboxylate-based admixtures and blended-cement pastes [J].
Alonso, M. M. ;
Palacios, M. ;
Puertas, F. .
CEMENT & CONCRETE COMPOSITES, 2013, 35 (01) :151-162
[6]  
[Anonymous], 2006, NEW TRENDS DEV CHEM, DOI DOI 10.3151/JACT.4.211
[7]  
[Anonymous], 2004, 5161959 IS B I STAND
[8]  
[Anonymous], 2019, Standard specification for steel, sheet, carbon, structural, and high-strength, low-alloy, hot-rolled and cold-rolled
[9]   The synthesis of a new chitosan based superplasticizer and investigation of its effects on concrete properties [J].
Arslan, Hulya ;
Aytac, Ugur Semih ;
Bilir, Turhan ;
Sen, Sadi .
CONSTRUCTION AND BUILDING MATERIALS, 2019, 204 :541-549
[10]   Accelerated carbonation and testing of concrete made with fly ash [J].
Atis, CD .
CONSTRUCTION AND BUILDING MATERIALS, 2003, 17 (03) :147-152