Development of response surface models for self-compacting hybrid fibre reinforced rubberized cementitious composite

Khed, Veerendrakumar C.; Mohammed, Bashar S.; Liew, Mohd Shahir

doi:10.1016/j.conbuildmat.2019.117191

Cited by 47 publications

(20 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The previous studies demonstrated the limitations of polar filler loading in NR composites. They found the tensile strength of the NR composite increased with increasing the filler content up to a maximum value (20–60 phr) and then decreased [ 12 , 13 , 31 , 32 , 37 ]. Higher filler loading in NR composite could lead to formation of filler agglomeration and undispersed filler in NR matrix, resulting in a weak filler–rubber interaction.…”

Section: Resultsmentioning

confidence: 99%

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Sintharm

Phisalaphong

2021

Polymers

View full text Add to dashboard Cite

Green natural rubber (NR) composites reinforced with black rice husk ash (BRHA)/white rice husk ash (WRHA), using alginate as a thickening and dispersing agent and crosslinking by CaCl2, was developed to improve mechanical, chemical and dielectric properties of NR-based films by using a latex aqueous microdispersion process. A maximum of 100 per hundred rubbers (phr) of rice husk ashes (RHAs) could be integrated in NR matrix without phase separation. Mechanical properties of the composite films were considerably enhanced, compared to the neat NR film. The composite films reinforced with WRHA demonstrated relatively better mechanical properties than those reinforced with BRHA, whereas the composites filled with BRHA demonstrated higher elongation at break. The crosslinking by CaCl2 improved the film tensile strength but lowered the film elasticity. The reinforcement strongly improved chemical resistance of the composite films in toluene. The films are biodegradable in soil, with weight loss of 7.6–18.3% of the initial dry weight after 3 months. Dielectric constant and dielectric loss factors of the composite films were enhanced with RHAs loading. According to the obtained properties, the composites offer potential for further development as stretchable conductive substrate or semiconducting polymer films for electronic applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Sintharm

Phisalaphong

2021

Polymers

View full text Add to dashboard Cite

show abstract

“…The design consisted of a total of 13 mixes (2 N + 2 N + 5, where N = number of independent factors) with 5 central points. This method has been followed by many researchers [ 4 , 59 , 60 , 61 , 62 , 63 ]. Therefore, 13 mix designs with varying percentages of CR and GO were obtained, as shown in Table 5 .…”

Section: Materials and Experimental Proceduresmentioning

confidence: 99%

“…ECCs are built to combine strong mechanical, physical, and toughness qualities even under normal or harsh conditions by using micromechanics-dependent theoretical methods [ 1 , 2 ]. An ECC is a composite material developed to allow the concrete industry to maximize the effective use of products, minimize waste, deliver economic and environmental benefits, and induce structural durability [ 3 , 4 ]. An ECC also shows high resilience to cracks, good ductility, and the ability to control crack depth, rendering it the ideal composite to improve the durability of civil infrastructures [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Acid and Sulphate Attacks on a Rubberized Engineered Cementitious Composite Containing Graphene Oxide

et al. 2020

Self Cite

View full text Add to dashboard Cite

The objective of this research was to determine the durability of an engineered cementitious composite (ECC) incorporating crumb rubber (CR) and graphene oxide (GO) with respect to resistance to acid and sulphate attacks. To obtain the mix designs used for this study, response surface methodology (RSM) was utilized, which yielded the composition of 13 mixes containing two variables (crumb rubber and graphene oxide). The crumb rubber had a percentage range of 0–10%, whereas the graphene oxide was tested in the range of 0.01–0.05% by volume. Three types of laboratory tests were used in this study, namely a compressive test, an acid attack test to study its durability against an acidic environment, and a sulphate attack test to examine the length change while exposed to a sulphate solution. Response surface methodology helped develop predictive responsive models and multiple objectives that aided in the optimization of results obtained from the experiments. Furthermore, a rubberized engineered cementitious composite incorporating graphene oxide yielded better chemical attack results compared to those of a normal rubberized engineered cementitious composite. In conclusion, nano-graphene in the form of graphene oxide has the ability to enhance the properties and overcome the limitations of crumb rubber incorporated into an engineered cementitious composite. The optimal mix was attained with 10% crumb rubber and 0.01 graphene oxide that achieved 43.6 MPa compressive strength, 29.4% weight loss, and 2.19% expansion. The addition of GO enhances the performance of rubberized ECC, contributing to less weight loss due to the deterioration of acidic media on the ECC. It also contributes to better resistance to changes in the length of the rubberized ECC samples.

show abstract

“…The signal to noise ratio of the model is estimated based on adequate precision (AP). For a model to be adequate, an AP value greater than 4 is generally desirable for a good model (Montgomery 2017, Khed 2020. In this investigation, the AP values for all the developed models were found to be greater than 4.…”

Section: Analysis Of Variance For the Response Models Developedmentioning

confidence: 66%

Effect of GGBS Slag on Setting Time and Compressive Strength of One-Part Geopolymer Binders

Haruna

Mohammed

Wahab

2020

Journal of Infrastructure &Amp; Facility Asset Management

Self Cite

View full text Add to dashboard Cite

This paper investigated the influence of ground granulated blast furnace slag (GGBS) on the setting time and compressive strength of one-part geopolymer binders (OPGB). Powdered sodium metasilicate activator was utilized in the range of 8 -16% by weight of the total binder. The central composite design method was used in designing the mixtures. Experimental investigation revealed that both the initial and final setting times of the OPGB decreased drastically with the increase in the GGBS and the activator content. The inclusion of GGBS in the binder influences the setting time of the binders thereby resulting in quick setting time. The variance analysis of the established models demonstrated that the setting and compressive strength models could be predicted using quadratic models with a high R 2 coefficient. Optimization results revealed that the optimum mixture can be obtained by substituting 95.8 % fly ash with GGBS and 13.4 % solid activator.

show abstract

Development of response surface models for self-compacting hybrid fibre reinforced rubberized cementitious composite

Cited by 47 publications

References 41 publications

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Green Natural Rubber Composites Reinforced with Black/White Rice Husk Ashes: Effects of Reinforcing Agent on Film’s Mechanical and Dielectric Properties

Acid and Sulphate Attacks on a Rubberized Engineered Cementitious Composite Containing Graphene Oxide

Effect of GGBS Slag on Setting Time and Compressive Strength of One-Part Geopolymer Binders

Contact Info

Product

Resources

About