Effects of Diethanolamine (DEA) and Glass Fibre Reinforced polymer (GFRP) on setting time and mechanical properties of shotcrete

Rezania, Mohammad; Moradnezhad, Hamed; Panahandeh, Mohsen; Kami, Mohammad Javad Rahimpoor; Rahmani, Aida; Hosseini, Bahador Vosough

doi:10.1016/j.jobe.2020.101343

Cited by 10 publications

(6 citation statements)

References 45 publications

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“…The samples were cured in the laboratory environment with a temperature of 20 ± 1 °C and a natural humidity of about 26% for 14, 28, and 60 days. In order to make the results applicable for the field projects, it is better to simulate the real field condition [ 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 ]. In other words, these specific curing times were selected in this research since foundations and structures are often built on lime-based concretes after two to eight weeks of concrete casting [ 21 ].…”

Section: Experimental Program and Methodologymentioning

confidence: 99%

Properties of Lime-Cement Concrete Containing Various Amounts of Waste Tire Powder under Different Ground Moisture Conditions

et al. 2022

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Lime-cement concrete (LCC) is a non-structural concrete in which lime and cement are used as the main binders. However, although LCC has many applications in reducing the settlement of foundations and providing a support layer for shallow foundations, little research has been conducted to evaluate its behaviour in various moisture conditions. Previous researchers have studied the feasibility of using waste tires in conventional concrete to alleviate their negative environmental impacts. However, in field projects, rubber has not been widely used because its application leads to the strength reduction of concrete. In the case of LCC, attaining high strengths is not required and thus application of waste tire particles sounds reasonable. This research evaluated the impact of various rubber powder contents on the fresh, geotechnical and durability properties of LCC at different saturation degrees induced by the capillary action and groundwater level increment, which has not been studied before. The results of more than 320 tests showed that the application of tire powder increases workability and decreases the water absorption of LCC. Moreover, all 60-day cured specimens exposed to 100% saturation degree experienced a strength reduction of less than 10% by using rubber powder contents varying from 0 to 20%. Moreover, increasing the saturation degree from 0 to 100% decreased the average compressive strength by 13.5 and 22% for 60-day cured samples of two different mix designs. The results of this research confirm that LCC containing up to 10% rubber powder could be promisingly used underneath or close to the groundwater table without its strength and geotechnical properties being jeopardized due to rubber employment and/or exposure to ground moisture.

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Section: Experimental Program and Methodologymentioning

confidence: 99%

Properties of Lime-Cement Concrete Containing Various Amounts of Waste Tire Powder under Different Ground Moisture Conditions

et al. 2022

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“…Such tendency was in accordance with those reported previously. [53][54][55][56][57] For one thing, the addition of glass bers enhanced the 'bridge effect' on inhibition of microcrack propagation inside cement. For another, higher w/c ratio resulted in higher porosity on the whole and thus depreciation of exural strength.…”

Section: Effect Of Dopamine-modied Glass Bers On Exural Strength Of Cementmentioning

confidence: 99%

“…Such might be resulted from the compromise between effect of dopamine modication and content of bers incorporated. As was widely reported more water promoted better dispersion of bers and excessive incorporation of bers adversely slowed down the strengthening effect to some extent 53,[58][59][60] so that the optimal enhancement was attained in relatively smaller quantities of ber incorporation, on which circumstance there might be slightly indistinct effect for modication of polydopamine. When w/c was lower, at higher ber content more porosity was likely to be incorporated which facilitated the bridging effect between ber reinforcements and cement matrix founded on modication of polydopamine and thus the enhancement effect of bers to cement performed ascending.…”

Section: Effect Of Dopamine-modied Glass Bers On Exural Strength Of Cementmentioning

confidence: 99%

Facile synthesis of novel dopamine-modified glass fibers for improving alkali resistance of fibers and flexural strength of fiber-reinforced cement

Xin²,

Zhang

et al. 2021

RSC Adv.

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“…Using glass fibers in foamed geopolymers is rare, despite their obvious applicability due to their high tensile strength and specific modulus 10 . In addition, the existing literature is not clear: some studies have reported that using glass fibers reduced the mechanical strength 11,12 and resulted in other small changes 13 or significant improvements 14,15 . Pender and Yang indicated that a significant reduction in interfacial shear strength was observed after recycling, which is attributed to the loss of the original sizing after recycling.…”

Section: Introductionmentioning

confidence: 99%

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

Lin

Cheng

et al. 2021

Env Prog and Sustain Energy

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This study used silicon carbide sludge (SCS) and waste glass fiber (WGF) to prepare SCS/WGF porous (SWP) eco‐fireproof materials by a hydrogen peroxide foaming agent. The results showed that the compressive strength of samples that were cured for 1 day and had an SCS replacement level of 10% and added amounts of WGF of 0.5% and 2.0% were 0.32 and 0.46 MPa, respectively. Additionally, it was observed that the stress–strain curves were relatively extended. WGF could improve the geopolymeric matrix of the composites in terms of formation and/or redistribution of cracks by bridging cracks and perforations within the matrix. When the added amounts of WGF were 0.5% and 2.0%, the reverse‐side temperatures of the samples were 238 and 262°C, respectively, which showed that adding an appropriate amount of WGF could effectively reduce the reverse‐side temperature of SWP eco‐fireproof materials. The results displayed the beneficial influence of SCS and WGF in improving bulking density, compressive strength, and flexural strength and in reducing porosity and thermal conductivity. Therefore, the results showed that SWP eco‐fireproof materials reinforced using SCS and WGF have potential as building materials.

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Effects of Diethanolamine (DEA) and Glass Fibre Reinforced polymer (GFRP) on setting time and mechanical properties of shotcrete

Cited by 10 publications

References 45 publications

Properties of Lime-Cement Concrete Containing Various Amounts of Waste Tire Powder under Different Ground Moisture Conditions

Properties of Lime-Cement Concrete Containing Various Amounts of Waste Tire Powder under Different Ground Moisture Conditions

Facile synthesis of novel dopamine-modified glass fibers for improving alkali resistance of fibers and flexural strength of fiber-reinforced cement

Elucidating the effects of silicon carbide sludge and waste glass fiber on the characteristics of porous eco‐fireproof materials

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