The evaluation with anova of the effect of lime admixture and thermal cure time on fly ash paste activated with sodium silicate solution

Görhan, Gökhan

doi:10.1016/j.conbuildmat.2015.07.011

Cited by 11 publications

(4 citation statements)

References 36 publications

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“…The compressive test, according to NBR 5739 [33], and the tensile splitting strength test, according to NBR 7222 [34], were carried out in three cylindrical specimens of 100 Statistical evaluation was performed using the analysis of variance (ANOVA) that allows to determine whether an independent variable has, or not, an effect on the dependent variable. In addition, it can also be used to identify whether the interactions of independent variables have, or not, an effect on the dependent variable [36,37]. In this work, ANOVA calculations were carried out according Hines al.…”

Section: Test Methods Of Materialsmentioning

confidence: 99%

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

Lima

Barros

Roque

et al. 2018

Construction and Building Materials

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This work is dedicated to the assessment of the structural capacity of a new lightweight block for one-way precast concrete slabs made of short sisal fiber reinforced concrete (SSFRC) containing natural and recycled aggregate. Flexural tests were carried out on SSFRC block samples, as well as on ceramic and EPS blocks used commercially. Slab panels including SSFRC, ceramic and EPS blocks were tested under four point bending configuration to assess the benefits of the new SSFRC block in quasi-real slab conditions. The results of the tests indicated the influence of the sisal fibers and recycled aggregate on the physical and mechanical properties of the concrete and the best structural performance of the SSFRC blocks in relation to commercial solutions. The flexural behavior and cracking of slabs were presented and discussed. Numerical models were also developed to predict the nonlinear behavior of the SSFRC and to simulate the flexural behavior, crack initiation and propagation in the blocks. By adopting this numerical strategy, a parametric study was carried out to simulated new design of blocks and to demonstrate that the load carrying capacity at serviceability limit state conditions can be significantly increased with the thickness of SSFRC block.

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Section: Test Methods Of Materialsmentioning

confidence: 99%

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

Lima

Barros

Roque

et al. 2018

Construction and Building Materials

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“…It was found that the UCS reached a maximum when the sodium silicate content was 6-8%. The SEM test showed that, compared with no sodium silicate, after adding 6% sodium silicate, the internal hydration products (calcium silicate (C-S-H), calcium aluminate (C-A-H)) and gelling products (hydrated calcium aluminosilicate (sodium) (C (N)-A-S-H)) increased significantly, the porosity decreased significantly, and the strength improved [11,35]. Considering the comprehensive economy, the quality of sodium silicate was 6% of the mass of the dry soil.…”

Section: Test Instrument and Test Schemementioning

confidence: 99%

“…The use of environmentally friendly curing agents is the future trend. Therefore, based on previous studies, lime, fly ash, and sodium silicate were used as the combined curing agent in this study [35,36]. In addition, although the influence of different mixing ratios on the dynamic characteristics of EPS lightweight soil (SLS) has been discussed in previous limited experiments, there is no study on the dynamic characteristics of EPS lightweight soil treated with sodium silicate-lime-fly ash (SLS).…”

Section: Introductionmentioning

confidence: 99%

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

et al. 2023

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In recent years, expanded polystyrene (EPS) lightweight soil has been widely used as subgrade in soft soil areas because of its light weight and environmental protection. This study aimed to investigate the dynamic characteristics of sodium silicate modified lime and fly ash treated EPS lightweight soil (SLS) under cyclic loading. The effects of EPS particles on the dynamic elastic modulus (Ed) and damping ratio (λ) of SLS were determined through dynamic triaxial tests at various confining pressures (σ3), amplitudes, and cycle times. Mathematical models of the Ed of the SLS, cycle times, and σ3 were established. The results revealed that the EPS particle content played a decisive role in the Ed and λ of the SLS. The Ed of the SLS decreased with an increase in the EPS particle content (EC). The Ed decreased by 60% in the 1–1.5% range of the EC. The existing forms of lime fly ash soil and EPS particles in the SLS changed from parallel to series. With an increase in σ3 and amplitude, the Ed of the SLS gradually decreased, the λ generally decreased, and the λ variation range was within 0.5%. With an increase in the number of cycles, the Ed of the SLS decreased. The Ed value and the number of cycles satisfied the power function relationship. Additionally, it can be found from the test results that 0.5% to 1% was the best EPS content for SLS in this work. In addition, the dynamic elastic modulus prediction model established in this study can better describe the varying trend of the dynamic elastic modulus of SLS under different σ3 values and load cycles, thereby providing a theoretical reference for the application of SLS in practical road engineering.

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“…Analysis of Variance. To investigate and compare the statistical significance level of the variables on mass loss and mechanical properties, a two-way analysis of variance (ANOVA) test [17] was carried out for the data obtained from the specimens and the results were presented in Table 3. The confidence interval for statistical tests was 95% (α = 0.05) in the study.…”

Section: Compressive Strengthmentioning

confidence: 99%

Mechanical Properties of Ultra-Lightweight Geopolymer Composite after Elevated Temperature Exposure

Huang

Zheng

et al. 2022

KEM

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This paper investigates the mechanical properties of a new type of ultra-lightweight geopolymer composite (ULGC) exposed to elevated temperatures up to 700 °C. This ULGC materials, using ground granulated blast furnace slag, fly ash, and silica fume as the precursor as well as fly ash cenosphere as lightweight aggregates, has a density of less than 1400 kg/m3 and compressive strength up to 40 MPa and thus it has high structural efficiency compared to other types of concrete materials. The effect of polyvinyl alcohol (PVA) fiber dosage and PVA fiber length on the compressive strength, bending strength as well as mass loss of ULGCs after elevated temperature exposure were evaluated, combining a two-factor analysis of variance. The results indicated that when the temperature was below 300 °C, the PVA fiber could improve the mechanical properties of ULGC. However, when the temperature was higher than 300 °C, due to the melting of fibers, the positive effect of fiber dosage on bending strength significantly reduced, and fiber dosage exhibited a negative effect on compressive strength. The ULGCs containing 6mm and 18mm fibers showed better bending strength, while the effect of fiber length on compressive strength of ULGC was negligible.

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The evaluation with anova of the effect of lime admixture and thermal cure time on fly ash paste activated with sodium silicate solution

Cited by 11 publications

References 36 publications

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

Short sisal fiber reinforced recycled concrete block for one-way precast concrete slabs

Study on Dynamic Modulus and Damping Characteristics of Modified Expanded Polystyrene Lightweight Soil under Cyclic Load

Mechanical Properties of Ultra-Lightweight Geopolymer Composite after Elevated Temperature Exposure

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