Mathematical modelling of concrete compressive strength with waste tire rubber as fine aggregate

Chong, Beng Wei; Othman, Rokiah; Ramadhansyah, P. J.; Doh, Shu Ing; Li, Xiaofeng

doi:10.15282/jmes.15.3.2021.12.0656

Cited by 2 publications

(2 citation statements)

References 25 publications

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“…The increase in cohesiveness and more water demand for wetness for the particles dedecreaseshe the workability of the mix. Similar findings can be found in [43][44][45].…”

Section: Figure 3 Flow Table Of the Selected Mixturesupporting

confidence: 89%

Çeşitli Endüstriyel ve Yumurta Kabuk Atıklarının Sürdürülebilir İnşaat Sektörü için Kullanılması

Aydın

2023

Journal of Polytechnic

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The alternative composites’ production alleviates the serious problem generated by global warming. Methods to reduce the amount of cement used in concrete production, for example, are being investigated to determine how to reduce carbon dioxide emissions in many applications. Egg shells and various industrial wastes, which are recommended to use in the construction sector at an appropriately high rate, also cause serious environmental damage. Bottom ash (BA) and marble powder (MP) wastes are used today in civil engineering applications. In addition, it is important to increase the use of eggshells due to their rich calcium carbonate content. In this work, BA and MP wastes were blended with eggshells to produce cement paste composites. Two different sets of composites were prepared during this study. The composites were prepared with cement (80%), BA (20%), and MP (20%) wastes by weight with 0.3%, 0.75%, 1.5%, and 2.5% eggshell waste. The fresh (flow table), physical (dry unit mass, apparent specific gravity, and porosity), mechanical (unconfined compressive strength and flexural strength), and durability (water absorption, seawater resistance) tests were conducted. According to the experimental results, the composites can be classified as lightweight construction materials. The test results showed that 0.75% eggshell by weight of cement in bottom ash and marble powder can be used as an optimum value for better performance. The bottom ash mixtures groups are higher water absorption and porosity values when referring to the marble powder mixture groups. The highest compressive strength value was found at 56.03 MPa in the MP mixture group and 52.79 MPa in the BA mixture groups with these optimum eggshell combinations at 56 days. The MP mixture group showed better resistance to seawater when referring to the bottom ash blended mixtures. Laboratory-produced composites are possible candidates for cost-effective and environmentally friendly building materials. The eggshells have a promising alternative binder for concrete in the near future and they are utilized together with industrial wastes such as BA and MP in sustainable concrete construction.

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“…The increase in cohesiveness and more water demand for wetness for the particles dedecreaseshe the workability of the mix. Similar findings can be found in [43][44][45].…”

Section: Figure 3 Flow Table Of the Selected Mixturesupporting

confidence: 89%

Çeşitli Endüstriyel ve Yumurta Kabuk Atıklarının Sürdürülebilir İnşaat Sektörü için Kullanılması

Aydın

2023

Journal of Polytechnic

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“…Figure 3 shows the residual-versus-order plot of the model. In this model, the residual-versusorder plot shows a random, non-uniform zig-zag pattern across the data, demonstrating that no other significant factor was not included in the regression analysis of RSM [15].…”

Section: Figure 2 Pareto Chartmentioning

confidence: 95%

Mathematical Analysis on the Durability of Basalt Rebars in Acidic Environment

Han

Othman

Wei

et al. 2023

Construction Technologies and Architecture

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Fiber reinforced polymer materials have been used as the alternative to conventional steel reinforcement within the construction industry. While Basalt fiber reinforced polymers (BFRP) have shown improved mechanical properties and durability performance compared to conventional steel, it is not immune to degradation and corrosion when subjected to harsh environments. As such, significant studies have been conducted to simulate the mechanical properties of BFRP bars under degradation when subject to different hostile substances. However, there is no standardized conclusion for the performance of BFRP under an acidic environment and in-depth microstructure evaluation as the degradation of BFRP is influenced by myriad factors. This study aimed to produce a Response Surface Methodology (RSM) model to study the effect of pH, temperature, and immersion time on the tensile strength and elastic modulus. Data from existing literature involving acid emersion of BFRP were collected and modelled using RSM to present an overview of the degradation behavior of BFRP. In addition, a synthesis of the microstructure of BFRP reinforcing bars exposed to the acidic environment was evaluated by referring to SEM and EDX. It was concluded that the tensile strength loss due to corrosion was affected by temperature and immersion time in a linear function. On the other hand, tensile strength drop occurred exponentially as an acid with higher pH was used. Hence, the paper revealed the influence of various factors on the corrosion rate of the BFRP rebar.

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Mathematical modelling of concrete compressive strength with waste tire rubber as fine aggregate

Cited by 2 publications

References 25 publications

Çeşitli Endüstriyel ve Yumurta Kabuk Atıklarının Sürdürülebilir İnşaat Sektörü için Kullanılması

Çeşitli Endüstriyel ve Yumurta Kabuk Atıklarının Sürdürülebilir İnşaat Sektörü için Kullanılması

Mathematical Analysis on the Durability of Basalt Rebars in Acidic Environment

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