Effect of alkali activator concentration on waste brick powder-based ecofriendly mortar cured at ambient temperature

Yehualaw, Mitiku Damtie; Hwang, Chao‐Lung; Vo, Duy‐Hai; Koyenga, Abraham

doi:10.1007/s10163-020-01164-6

Cited by 20 publications

(9 citation statements)

References 60 publications

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“…The peaks in XRD patterns also support gel formation. CSH and N(C)-S-A-H gels are the products observed in the geopolymer matrix [26,31,[93][94][95][96]. A porous structure is observed in the N3T3-S/A-2 sample.…”

Section: Compressive Strength Test Resultsmentioning

confidence: 98%

“…Fletcher et al [29] stated that the modulus of elasticity increased with the increase in the amount of SiO 2 . Factors such as water/binder, activator/binder, curing temperature, curing time are also important for mechanical strength [9,10,30,31]. Mahmoodi et al [32] stated that, in the geopolymers they produced using ceramic tile waste, class C fly ash and BFS additive provide hardening at room temperature and provide normal and high compressive strength.…”

Section: Introductionmentioning

confidence: 99%

“…They stated that a value of 11.1 for S/A and 0.2 for Na 2 O/SiO 2 led to the formation of more C-N-A-S-H gels. Yehualaw et al [31] used waste brick dust as a binder in the production of alkali-activated mortar and replaced waste ceramic sand with natural aggregate as aggregate. They stated that the compressive strength increased with the increase of the activator concentration.…”

Section: Introductionmentioning

confidence: 99%

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The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

Kaya

2021

J Mater Cycles Waste Manag

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In this study, the effect of micro-SiO 2 (S) and micro-Al 2 O 3 (A) additives on the strength of geopolymer pastes was investigated. Micro S + A are added to the raw ceramic powder (CP) by weight. NaOH is used as activator. The ratio of NaOH is adjusted to contain 3%, 6% and 9% sodium (Na) in proportion to the binder weight. CP is mixed with micro S, micro A and NaOH + water in a standard cement mixer, it is placed in standard molds of 40 mm × 40 mm × 160 mm. The molds were wrapped in a fireproof oven bag and kept in the oven at 105 °C for 24 h. As a result of the mechanical tests on the samples compressive strength between 3.53 and 17.97 MPa were determined in the samples containing micro S and micro A. An increase in compressive strength was observed with the increase of S/A and (S + A)/CP ratio in the samples. As a result of the regression analysis, it was concluded that 1.60% for S/A, 8.52% for (S + A)/CP and 6.74% for Na in geopolymer pastes could be the optimum mixing ratio.

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Section: Compressive Strength Test Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

Kaya

2021

J Mater Cycles Waste Manag

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“…During manufacturing, the clay brick is subjected to temperatures between 500 o C and 900 o C, which could cause the silicate crystal structure to change into an amorphous compound [10]. The WCB was ground to WRP, which contained amorphous compounds that may react with alkaline solution or cement component to create binding products, improving the properties of mortar and concrete samples [11,12]. Heidari A and Hasanpour B [13] investigated the pozzolanic activity of WCB in concrete and illustrated that the compressive strength of mortar with 20% WCB was reduced by 3.23% when compared with the control mortar at 90 days.…”

Section: Introductionmentioning

confidence: 99%

Strength development and microstructure evaluation of cement mortar incorporating various waste red brick powder

Ngo,

Vo,

Phan

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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This research aims to evaluate the strength development and microstructure of a green mortar produced from waste red brick powder (WRP) as a partial cement replacement. The mortar samples were prepared with various WRP content of 0%, 10%, 20%, 30%, and 40% of total binder weight, and the w/b was fixed at 0.4. The fresh properties were checked by flowability and fresh unit weight. While the compressive strength was conducted up to 28 days. The mortar samples exhibited a reduction in flowability and unit weight with increasing WRP content. The incorporation of 10%-20% WRP improved the compressive strength of mortar samples at 28-day, while the compressive strength reduced with higher WRP content (30%-40%). The C-S-H/CaCO3 gel, Ca(OH)2 and ettringite were hydration products of WRP mortar samples. The incorporation with WRP significantly reduced the Ca(OH)2 content

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“…About 8% of total CO 2 emissions worldwide come from the production of Portland cement. [2][3][4] However, it is inevitable that concrete will be used as one of the most used and successful building materials in the world and OPC as the most popular binder in the near future. 5 Therefore, in order to alleviate the problems associated with Portland cement production and as an alternative to OPC, environmentally friendly hybrid alkali cements and low-carbon alkali-activated materials have been developed in recent years and it is thought that these materials will contribute to the reduction of CO 2 emissions.…”

Section: Introductionmentioning

confidence: 99%

Insulating and fire‐resistant performance of slag and brick powder based one‐part alkali‐activated lightweight mortars

Köksal

Bayraktar

Bodur

et al. 2022

Structural Concrete

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Waste brick powder (WBP) has enough pozzolanic characteristics to be employed as a supplemental cementing material in Portland cement-based concrete or as a precursor in the manufacture of alkali activated materials.This study was aimed to study the strength, thermal, microstructural and durability properties of ground blast furnace slag (GBFS) and WBP based one-part alkali-activated lightweight mortars (AAMs) produced with expanded vermiculite.One-part AAM mixtures were produced by using GBFS and WBP as binary precursors. Sodium metasilicate powder was used as the alkali activator. Two curing regimes namely heat curing at 75 C for 24 h and air curing at ambient conditions were adopted. GBFS was used as main binder and WBP was added at the rates of 0%, 10%, 25%, and 50% instead of GBFS. Four different mixtures were prepared by replacing GBFS at the rates of 0%, 10%, 25%, and 50% with WBP for each curing regime (totally eight mixtures). Expanded vermiculite powder were used as lightweight aggregates in all mixtures. The effects of WBP on AAM mixtures properties, including flowability, compressive strength, flexural strength, dry bulk density, thermal conductivity, porosity, and water absorption were studied. The effects of WBP and curing regime on drying shrinkage, sorptivity were also investigated. High temperature performance of the produced mixtures were determined.Results showed that air-cured WBP incorporated AAM mixtures exhibited better compressive strength, flexural strength, shrinkage, and sorptivity performance than the heat-cured WBP incorporated AAM mixtures. The air-cured AAM mixtures containing 25% WBP achieved the best results of 5.69 and 1.43 MPa for compressive strength and flexural strength at test age of 28 days. The heat-cured 50% WBP incorporated AAM mixture showed the best high temperature resistance and the lowest thermal conductivity. K E Y W O R D Scuring regimes, expanded vermiculite powder, ground blast furnace slag, one-part alkaliactivated, waste brick powder

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Effect of alkali activator concentration on waste brick powder-based ecofriendly mortar cured at ambient temperature

Cited by 20 publications

References 60 publications

The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

The effect of micro-SiO2 and micro-Al2O3 additive on the strength properties of ceramic powder-based geopolymer pastes

Strength development and microstructure evaluation of cement mortar incorporating various waste red brick powder

Insulating and fire‐resistant performance of slag and brick powder based one‐part alkali‐activated lightweight mortars

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