Development and Characterization of Fly Ash–Slag Blended Geopolymer Mortar and Lightweight Concrete

Ismail, Najif; El-Hassan, Hilal

doi:10.1061/(asce)mt.1943-5533.0002209

Cited by 72 publications

(17 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There were several recent studies about lightweight foamed alkali-activated materials (AAM), which are referred to as geopolymers in some literature as well, based on fly ash (Najif and El-Hassan 2018) and bottom ash (Görhan and Kürklü 2014). AAMs have been demonstrated to possess many of the necessary qualities a lightweight cementitious material should display, namely high temperature resistance (Cheng-Yong et al 2017), low shrinkage (Duxson et al 2007), low coefficient of permeability (Tenn et al 2015), low thermal conductivity (Wang et al 2010) and good nailability (Duan et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Lightweight Alkali-Activated Material from Mining and Glass Waste by Chemical and Physical Foaming

Kastiukas

Zhou

Wan

et al. 2019

J. Mater. Civ. Eng.

View full text Add to dashboard Cite

A foamed alkali-activated material (FAAM) based on tungsten mining waste (TMW) and municipal waste glass (WG) is fabricated by using aluminum powder and organic surfactant foaming agents. The compressive strength and density of the FAAM are investigated in terms of different parameters of production and formulation, including curing temperature as well as the dosage of Na 2 O, foaming agent, foam catalyzing agent, and stabilizing agent. FAAM made with aluminum powder consists of smaller open macropores and exhibits higher compressive strength compared with FAAMs with larger closed macropores obtained by organic surfactant counterparts. The final aluminum powder-based FAAM reaches a 7-day compressive strength in excess of 3 MPa and a density below 0.7 g=cm 3. The implementation of an appropriate amount of foam stabilizer leads to a further 15% increase in compressive strength, 6% reduction in density, and a thermal conductivity below 0.1 W=mK. The FAAM explored in this study represents an ideal material for building envelope insulation.

show abstract

Section: Introductionmentioning

confidence: 99%

Lightweight Alkali-Activated Material from Mining and Glass Waste by Chemical and Physical Foaming

Kastiukas

Zhou

Wan

et al. 2019

J. Mater. Civ. Eng.

View full text Add to dashboard Cite

show abstract

“…Detailed SEM and EDX analysis of the geo-polymer paste has been reported by authors in a precedent study [33] and key findings are reported here for relevance. Figure 9 shows the micrograph of the geo-polymer.…”

Section: Resultsmentioning

confidence: 88%

“…Ground granulated blast furnace slag (GGBS) and fly ash (FA) waste materials are investigated and found to form a GP by activating polymerization using a mixed solution of sodium silicate (Na 2 SiO 3 ) and sodium hydroxide (NaOH). Based on the previous composition optimization [33], NaOH and Na 2 SiO 3 were kept as 1:1.5 while the ratio of GGBS to FA to DS was fixed 1:3:6 in the geo-polymer paste composition. Three different grades of lightweight expanded clay aggregate (LECA) in terms of particle size and morphology were used.…”

Section: Methodsmentioning

confidence: 99%

“…A total of 18 molar NaOH solutions were blended with the Na 2 SiO 3 solution and shake well for five minutes to assure solution homogenization. The mixing ratios and solution molarities being applied in the current research were reported to achieve a maximum compressive strength [33]. Due to the exothermic nature of the reaction, the heated solution was kept for one day in ambient conditions to cool down prior to being poured into a dry mix of FA, GGBS, and DS.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and Characterization of Expanded Clay-Paraffin Wax-Geo-Polymer Composite Material

et al. 2018

Self Cite

View full text Add to dashboard Cite

Paraffin-based phase change material (PCM) is impregnated into the pores of lightweight expanded clay aggregate (LECA) through vacuum impregnation to develop PCM containing macro-capsules of LECA. Three different grades of LECA varying in size and morphology are investigated to host the PCM to determine the impregnation effectiveness, viability for coating, and its stability. The produced LECA-PCM is coated with geopolymer paste (GP) to provide leak proofing during the phase change. The PCM is thermophysically characterized by employing differential scanning calorimetry (DSC) and the temperature history method (THM) to determine the phase transition and the latent heat. The stability of the macro-capsules is determined by weight loss through rapid thermal cycling (RTC) at elevated temperatures. Leakage of the PCM is tested using the diffusion-oozing circle test (DOCT). The results show that the GP coated LECA-PCM macro-capsules achieved 87 wt % impregnation efficiencies and no noticeable loss of PCM, which indicates leak proofing of the developed capsules up to 1000 RTC.

show abstract

“…However, Ismail and El-Hassan reported a significant difference in compressive strength between heat-cured and ambient-cured samples at 28 days. The variation was around 28.5% for one set of conditions at the value of around 112 MPa for the heat-cured sample [19]. In the current study, heat curing of GP is employed not to answer the questions entailing the effect of heat curing onto compressive strength but to instill porosity into the GP.…”

Section: Introductionmentioning

confidence: 98%

Development and Mechanical Testing of Porous-Lightweight Geopolymer Mortar

Qadir¹,

Rashid²,

Ahmad³

et al. 2020

Preprint

View full text Add to dashboard Cite

In this study, a novel porous geopolymer mortar (GP) was produced and tested experimentally. Industrial waste materials/by-products were used as constituents of the GP, along with dune sand. One sample was produced as a control sample for benchmarking. For the rest of the samples, 15%, 30%, and 45% by volume, the solid constituents were replaced with expanded polystyrene foam (EPS) beads. These mortar samples were heat cured to depolymerize the EPS to cause porosity inside the samples. Indoor experiments were conducted to evaluate the response of produced porous GP to high heat flux. The porous samples were able to reduce heat transmission across the opposite surfaces. Induced porosity resulted in a decrement in compressive strength from 77.2 MPa for the control sample to 15.8 MPa for 45% porous sample. However, the limit lies within the standards for partitioning walls in buildings and pavements in urban areas to absorb rainwater.

show abstract

Development and Characterization of Fly Ash–Slag Blended Geopolymer Mortar and Lightweight Concrete

Cited by 72 publications

References 38 publications

Lightweight Alkali-Activated Material from Mining and Glass Waste by Chemical and Physical Foaming

Lightweight Alkali-Activated Material from Mining and Glass Waste by Chemical and Physical Foaming

Preparation and Characterization of Expanded Clay-Paraffin Wax-Geo-Polymer Composite Material

Development and Mechanical Testing of Porous-Lightweight Geopolymer Mortar

Contact Info

Product

Resources

About