Compressive strength and chloride resistance of grout containing ground palm oil fuel ash

Mujah, Donovan

doi:10.1016/j.jclepro.2015.07.066

Cited by 49 publications

(16 citation statements)

References 49 publications

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“…As a result, the mass of OPC mortar has higher percentage of mass change compared with biomass mortar. Similar findings on chloride penetration were also reported by previous research [14,15].…”

Section: Testing Proceduressupporting

confidence: 92%

Influence of Oil Palm Biomass Waste on Compressive Strength and Chloride Penetration of Mortar

et al. 2017

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Abstract.The utilization of waste materials which are abundant and cheap, especially from clean resources, has become more pressing than ever. This study investigates the influence of Oil Palm Biomass waste including the Palm Oil Fuel Ash (POFA), Oil Palm Kernel Shell (OPKS) and Oil Palm Fibre (OPF) on the compressive strength and chloride penetration of mortar. The POFA was used as cement replacement up to 80% in nano size. The mass ratio of fine aggregates to binder was 3:1. Test specimens 70×70×70 mm cube were prepared and cured in water for 28 days. Ordinary Portland cement (OPC) mortar was also prepared as control specimen. The specimens were immersed in Sodium Chloride solution up to 18 months. The evaluation was done by visual observation, ultrasonic pulse velocity and mass change before and after exposure. The mortar was then split into two and sprayed with 0.1N Silver Nitrate solution to see the depth of penetration. The test results revealed that biomass mortar showed high resistance to chloride penetration as compared to OPC mortar due to the reduction of cement content in the mixture. Besides, the reactive silica from nano POFA produced more crystalline formation thus, reduced the porosity and crack within the biomass mortar.

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Section: Testing Proceduressupporting

confidence: 92%

Influence of Oil Palm Biomass Waste on Compressive Strength and Chloride Penetration of Mortar

et al. 2017

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“…On the other hand, the compressive strength development showed an increasing trend at the later ages (>28 days) as a result of the formation of extra C-S-H gel upon reaction between the high content of SiO 2 from POFA with the Ca(OH) 2 produced during the cement hydration process [50]. Moreover, as mentioned by Alsubari et al (2016) [51] and Mujah (2016) [52], the increase in compressive strength was due to the densification effect and the improvement of the micro-structure of concrete containing POFA. The relationship between compressive strength and cement replacement level of POCP concretes is shown in Figure 9.…”

Section: Effect Of Water Curingmentioning

confidence: 89%

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

et al. 2017

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Abstract:The utilization of traditional supplementary cementitious materials (SCMs) has become more intense in the concrete industry due to their better long-term properties. This research evaluates the fresh and hardened properties of concrete that was developed using a high amount of recycled aggregate (RA) incorporated with sustainable SCMs. Rice husk ash (RHA), palm oil fuel ash (POFA) and palm oil clinker powder (POCP) were used as SCMs at 10%, 20% and 30% cement replacement levels to investigate their positive role in the performance of RA concrete. The results showed that the 10% replacement level of cement by RHA produced the highest strength at all ages tested. Although POFA and POCP were found to negatively affect the strengths at an early age, the hardened properties showed improvement after a relatively long curing time of 90 days. In addition, the targeted compressive strength of 30 MPa was achieved by using SCMs at levels up to 30%. Overall, the sustainable SCMs can reduce the quantity of cement required for concrete production, as well as reduce the conventional cement with the industrial by-products, which are considered as waste materials; thus, the concrete produced using up to 30% of SCMs as a replacement for cement could be considered as more environmentally-friendly concrete.

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“…According to Table 4 of the uniform test design ratio, different grouting materials were selected for the grouting mixture ratio test. The evaluation parameters of the mixture ratio test include: slurry fluidity (Khayat et al 1998), viscosity (Kim et al 2009), initial setting time, final setting time (Khayat et al 2002), bleeding rate (Gustin et al 2007), compressive strength (Mujah et al 2016) and concretion rate (Xue et al 2013). The test mainly examines the influence of different grouting materials and different mixing ratios on the above evaluation index, and a reasonable grouting slurry mixing ratio is determined to provide a basis for the grouting treatment of soft rock roadways.…”

Section: Experiments Processmentioning

confidence: 99%

Proportion optimization of grouting materials for roadways with soft surrounding mass

Hao

Feng

Wang

2020

International Journal of Green Energy

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Severe deformation and failure frequently occur in roadways with soft or weak surrounding rock and have greatly influenced safe and efficient mining of coal in many coal mines. Using portland cement, emery and fly ash as main raw materials, through laboratory tests, effect of water/binder ratio, cement/sand ratio, water/sodium silicate ratio, water reducing agent, fly ash/cement ratio and various performance indexes of grout of fluidity, viscosity, setting time, bleeding rate, compressive strength, concretion rate and various performance indexes were systematically analyzed. An optimized mixture ratio of the main raw materials added in the grouting material proportion was determined through uniform design method, an optimal mixture ratio was determined by regression analysis. The results show that: 1) The flow performance is significantly affected by change of sodium silicate and water reducer, the compressive strength of grouting material increases significantly with increase in emery content, and decreases significantly with increase in water reducer. 2) An optimized mixture ratio among water cement ratio, cement sand ratio, water/sodium silicate ratio, water reducing agent, fly ash/cement ratio in the grouting material is 0.75, 1.2, 8%, 3% and 0.18, respectively. Field test demonstrated that the material has better performance in reinforcing weak and broken rock mass.

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Compressive strength and chloride resistance of grout containing ground palm oil fuel ash

Cited by 49 publications

References 49 publications

Influence of Oil Palm Biomass Waste on Compressive Strength and Chloride Penetration of Mortar

Influence of Oil Palm Biomass Waste on Compressive Strength and Chloride Penetration of Mortar

Evaluation of Industrial By-Products as Sustainable Pozzolanic Materials in Recycled Aggregate Concrete

Proportion optimization of grouting materials for roadways with soft surrounding mass

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