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1. Introduction. Concrete is considered one of the most commonly used materials in the world, with an estimated annual production of 27.3 billion tonnes in 2015, making an average of about 1.6 m 3 for each person on the earth [1].Portland cement, the essential concrete binder, accounts for nearly 80% of total concrete CO 2, emissions, …
Also, the high amount of super-plasticizer might cause bleeding and affect concrete strength . However, no studies have inspected the influence of POFA on …
Additionally, the effect of crude oil on heat flow and cumulative heat was analysed. The results demonstrated that increasing oil content decreases concrete …
Works by Ejeh (2009), Osuji (2015) and Ezihe (2021) indicated that crude oil is aggressive to concrete and that the presence of crude oil in concrete influences the strength properties of the ...
more than 5% crude oil contamination reduces compressive strength of concrete more than 50%.In recent years, deterioration has been found in the concrete structures …
The results showed that POFA concrete with W/B ratio of 0.40 had the compressive strengths ranging from 45.8 to 55.9 MPa or 82–94% of OPC concrete at 90 days, while POFA concrete with W/B ratio ...
Garages, Workshops, Oil Storage & Refineries: Petrol, Diesel & Oils Timber yards and Wharves: Creosote, Diesel, Fuel Oil. Brownfield sites often require concrete to be placed in contact with soils contaminated with hydrocarbons. Hydrocarbons can adversely affect the hydration of fresh concrete if intermixed i.e. they retard concrete strength gain.
Performance of High-Strength Concrete Using Palm Oil Fuel Ash as Partial Cement Replacement," vol. 5, no. 4 ... Influence of palm oil fuel ash on fresh and mechanical properties of self-compacting concrete," Sadhana - …
Effect of high temperatures on strength of oil-well cements (Mid-Continent district study commitee on cementing practices and testing of oil-well cements). ... Silica content influence on cement compressive strength in wells subjected to steam injection. ... Factors influencing strength development of concrete containing silica fume. Cement ...
On the other hand, high volume fly ash high strength concrete showed higher strength than Portland cement concrete on the 720 day age of concrete. After 2 years, the high volume fly ash high strength concrete with the addition of Nano SiO 2 showed an increase in strength by 11% than PCC. P.Kumar Mehta. [20]
The influence of different crude oil products on concrete in comparison to water investigated by the author and other researchers is shown in Fig. 1. The most common …
1. Introduction. With low tensile strength and strain capability, plain concrete is a fragile substance [1].Additionally, according to research, cement mortar may have issues with its tensile capacity, high porosity, fracture development, weak impact resistance, water penetrability, and chemical stability [2].Since the late 1960s, the usage of fiber …
The serviceability and ultimate strength of reinforced concrete structures are greatly influenced by the strength of the bond mechanism between steel and concrete. The bond ensures that the …
The compressive strength and bulk density of the 28 concrete (PKSC) were 13.16N/mm 2 and 1805kg/ (NWC) were 33.85N/mm 2 and 2445kg/m compressive strength requirements for structural …
DOI: 10.1016/J.CONBUILDMAT.2005.09.011 Corpus ID: 136067811; Influence of pozzolan from various by-product materials on mechanical properties of high-strength concrete @article{Sata2007InfluenceOP, title={Influence of pozzolan from various by-product materials on mechanical properties of high-strength concrete}, …
Many researchers have studied the use of agro-waste ashes as constituents in concrete. These agro-waste ashes contained an amount of silica which could be used as a pozzolanic material. Palm Oil Fuel Ash (POFA) is a by-product produced in palm oil mills. This ash has pozzolanic properties that not only enables the replacement of cement but …
European Scientific Journal February 2013 edition vol.9, No.6 ISSN: 1857 – 7881 (Print) e - ISSN 1857- 7431. 265 . of self compacting concrete and steel bars was studied also by Valcuende and ...
The article attempts to investigate the strength of the correlation between Young's modulus and the compressive strength of fibre-reinforced concrete. The influence of the amount of fibres on ...
Kostuch et al. (1993) reported that (i) CH was significantly reduced during time for all replacement levels (0, 10, and 20%); and (ii) 20% replacement of cement by MK was required to fully remove all the CH in concrete at 28 days. Oriol and Pera (1995) reported that between 30 to 40% MK is required to remove all the CH in MK-PC paste at a water …
Concrete is a common material which is widely used in civil and construction field. Nowadays, there are many types of concrete mixes, such as high - strength concrete, high - performance concrete (HPC), ultra-high - performance concrete (UHPC), lightweight concrete (LWC), and so on [[1], [2], [3]]. Recently, LWC has been studied in …
Civil Engineering Journal Vol. 2, No. 8, August, 2016 366 and Hu and Pu [10] conducted direct shear tests on the steel/concrete-sand interface in order to measure the interface
Influence of Palm Oil Fuel Ash on Properties of High-Strength Green Concrete. ... It was found that high-strength concrete can be achieved by using ground POFA to replace portland cement Type I up ...
Research highlights POFA concrete specimens prepared and subjected to various temperature levels. Two cooling systems viz. room temperature and water-spray were involved. Residual performance was higher in POFA concrete than in the normal concrete. water-cooling was realized to aggravate strength reduction compared with air …
The strength and durability of concrete mostly rely on the fundamental properties of fibres and the connection strength between concrete matrix and fibres [141]. Other study by Wongsa et al., [112] investigated the influence of two kinds of NF namely coconut fibre, and sisal fibre with glass fibre in different volume fraction on high calcium ...
In 2019, Hamada et al. [26] reported that adding up to 30 % of UPOFA in palm oil clinker concrete enhances the compressive strength and workability of concrete. In 2018, Wi et al. ... which influence the concrete strength. The UPV test is an indicator of the type and strength of the aggregates used [64]. A low UPV indicates the presence of ...
The 280-day compressive strength of oiled concrete was generally slightly higher than the 28-day strength of oil free concrete, while it was about 88% of the 280 …
Influence of palm oil fuel ash in concrete and a systematic comparison with widely accepted fly ash and slag: A step towards sustainable reuse of agro-waste ashes ... The relative compressive strength of concrete was reported as 100.8 %,101.61 %, 100 %, 89.51 % and 79.03 % for replacement levels 5 %, 10 %, 15 %, 20 % and 25 % …
Nevertheless, the findings indicated that sand contaminated with 10% oil is suitable for low-strength concrete applications. Incorporating 0.1% of Forta Ferro PP, glass, and ReoShore 45 PP fibres had a negligible impact on the mechanical properties of concrete contaminated with 10% oil. ... Instead, steel fibres possess the most prominent ...
Influence of Palm Oil Fuel Ash on Properties of High-Strength Green Concrete. ... It was found that high-strength concrete can be achieved by using ground POFA to replace portland cement Type I up ...
The influence of oil viscosities (kerosene, crude oil, and diesel) on the high-performance concrete showed that increasing oil viscosity decreases mechanical strength [9]. Under the petroleum ...
The influence of nanolimestone / nano CaCo 3 (NC) on the properties of ultrahigh-performance concrete (UHPC) cured at standard and heat conditions was experimentally investigated. The NC was used at ratios of 1, 2, and 3% as partial mass replacement for cement. Incorporating NC accelerated the hydration reactions of UHPC …
🕑 Reading time: 1 minute Factors Affecting Strength of Concrete Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete.
2.1 Origin of Palm Oil Fuel Ash. The palm oil industry is one of the most important agro-industries in certain countries like Malaysia, Thailand, Indonesia, and Nigeria. These industries produce many by-products in the form of empty fruit brunches, fibers, and kennels (Johari et al. 2011; Yusoff 2006).These enormous volumes of by …
The mineral oil content to a percentage of 2% is said to increase the strength of the concrete. But for more than 8% mineral oil, the strength is reduced. The vegetable oil in water used for concrete manufacture shows its detrimental effects on the strength of concrete at its later stages. Maximum Limit of Water Impurities for Concrete Construction
Reportedly, the flexural strength of POFA concrete could significantly improve by integrating unlike sorts of small artificial fibers, for instance, polypropylene and PVA, through the linking influence during the macro-and micro-cracking of the POFA concrete texture under flexural load [47,75,92,133].
Structural Concrete is a structural engineering journal publishing research on all aspects of concrete structures, including design, construction, demolition, and sustainability. Abstract Because natural coarse aggregates were depleting rapidly, concrete industry has been trended toward substitute aggregates from industrial by-products or …
height and 0.93 to 0.95 for compaction factor. The general strength of OPS concrete samples produced high strength concrete with compressive strength reaching up to 52.2N/mm2 for 28 days. 50% is sufficient for lightweight concrete however, 30% is the optimum percent to produce high strength with partially lightweight concrete. The …
Results of compressive strength showed that the finer the DPSA, the higher the concrete strength; and that cement can be replaced with DPSA up to 10% as the compressive strength at 10% replacement ...
The 280-day compressive strength of oiled concrete was generally slightly higher than the 28-day strength of oil free concrete, while it was about 88% of the 280-day strength of oil free concrete ...