Introducing supplementary cementitious materials (SCM), e.g. fly ash, into cement composite results in ecological benefits. However, in the case of high amount of SCM used as a replacement of a part of cement, there are problems related to the development of the desired properties of the final composite. Such mixtures often …
In this study, Afşin Elbistan C-type fly ash (FA) was used, which protects against the sulphate reaction that damages concrete. The detrimental effects of post-reaction decrease with increasing fly ash fineness. The study used 10%, 30%, and 50% weight substitutes of cement. The fly ash was ground in a ball mill for 0, 10, 20, 30, 45, …
The study was aiming to investigate the effect of partial replacement of cement by cattle bone ash (CBA) in a concrete property. Complete silicate analysis of CBA shows that the material has high calcium oxide content (43.26%) which is the major oxide compound of cement. A C-25 concrete grade was selected for this study.
The quest to mitigate the high cost and the environmental hazard associated with cement production has increased globally. Saw dust ash (SDA) and Millet husk ash (MHA)were obtained by burning at ...
Then it was burned in laboratory mill under the temperature of 600 ... C. VB, The effect of rice hull ash in cement and concrete mixes., Asian Institute of Technology, 1974. Google Scholar [17] H. Yousift, M.N. Al-Khalaf. Use of rice husk ash in concrete. Int. J. Cem. Comp. Light Weight Concr., 6 (4) (1984), pp. 241-248.
directly determined using Vicat Apparatus [39-42]. The cement pastes were then cast using the predetermined water of consistency, moulded into one inch cubic stainless steel moulds (2.5 x 2.5 x 2.5 cm3) using about 500 g cement mix, vibrated manually for three minutes and then on a mechanical vibrator for another three minutes.
The results show that the beneficial effects of high FA/c ratios on the residual compressive strength, associated with the accelerated pozzolanic reaction of fly ash at …
Bagasse is the main derivative of energy source and sugar mill for sugar ... of bagasse ash concrete for 6.5% and 13% replacement ratio dropped by 6.98% and 22.5% compared to full cement concrete ...
Sugarcane is a widely cultivated crop worldwide, with a global production exceeding 1.5 billion tonnes. Sugarcane bagasse (SCB) refers to the fibrous residue left behind after sugarcane stalks are crushed to extract juice for sugar production [6].Bagasse is a by-product of the sugarcane industry and is regarded as a waste material, as …
For this reason, alternative reusable materials that improve the mechanical properties of concrete, such as fly ash, are currently being investigated as an effective …
The results indicate that bagasse ash is an effective mineral admixture and pozzolan with the optimal replacement ratio of 20% cement, which reduced the chloride diffusion by more than 50% without any adverse effects on other properties of the hardened concrete.
in ranges of 200-300 0 C for 5 hours and then pulverized using a Hammer Mill ... fly ash sand in the concrete suggesting the use of geopolymer fly ash sand as a complete replacement material to ...
1. Introduction. Fly ash, a byproduct of coal-fired power plants, has been wildly used in cement and concrete technology for long time because of many reasons, such as reducing carbon footprint, decreasing hydration heat, enhancing long-age strength, improving durability and lower price [1], [2], [3], [4].However, decreased early-age …
The aim of this study was to examine the effect of ground wood ash on the mechanical properties of alkali-activated mortars. ... The wood ashes were ground in a planetary ball mill for 10 and 20 ...
Laterite soil collected from Maikunkele area of Minna, classified as an A-7-6 on AASHTO classification, was stabilized with 2-8% cement by weight of the dry soil. Using British Standard Light (BSL ...
Effects of Fly Ash on Concrete 1. On Amount of Mixing Water. The use of fly ash in limited amounts as a replacement for cement or as an addition to cement requires a little more water for the same slump because of fineness of the fly ash. It is generally agreed that the use of fly ash, particularly as an admixture rather than as a …
A comparison of rice husk ash's embodied energy to the high and positive embodied energy of Portland cement should encourage further investigation into replacing some of cement binder with ...
The basic aim of this study was to investigate the effect of wood ash obtained from uncontrolled burning of Sawdust on the strength development of concrete (Compressive strength, Flexural strength and Split Tensile strength) for two different water–cement ratio and to develop a regression model using Support Vector Machines …
Abstract: An agro-industrial waste product of sugar mills - Bagasse Ash was used to replace cement in concrete, up to a certain extent. Laboratory test results show that only up to 2% of cement ...
In this paper, the mechanical performance of ECCs incorporating high volume fly ash and bottom ash is reported. Emphasis is placed on the influence of fly ash content on the …
The use of geopolymer as a cementitious material for geopolymer concrete (GPC) is beneficial for the sustainable development and green transformation of the …
This research work is focused on the use of SCBA in concrete as a partial replacement of cement at 5%, 10%, 15% and 20% to determine its effect on properties of fresh and hardened concrete and ...
Abstract The study was aiming to investigate the effect of partial replacement of cement by cattle bone ash (CBA) in a concrete property. Complete silicate analysis of CBA shows that the material ...
The effect of RHA APS on concrete ... The ash was grinded using Los Angeles mill for 180, 270 and 360 minutes, The XRD analysis were performed to determine the
The major beneficial effect of fly ash in concrete is based on its physical properties. Filler effect. Fly ash fills voids in the fresh concrete normally filled with water, reducing the water content of the mix. The reduction of water demand partially compensates for the reduced early strength. On the other hand, it is essential to consider ...
Fly ash makes concrete workable; increasing its levels may reduce water demand and superplasticizer needs. •. Fly ash can improve mechanical and durability …
Low temperatures environment in cold regions seriously affect the hydration reaction of cementitious materials. In this study, we specifically investigated the effect of …
High-volume fly ash (HVFA) cementitious composites (paste, grout, mortar, and concrete) have been widely investigated as a class of sustainable materials due to …
This effect was investigated by Van den Heede et al. in fly ash blended concrete, who identified that carbonation-induced water formation at different CO 2 …
Sewage sludge used in this study was collected from West City Sewage Treatment Plant in Changsha. The use of polymeric aluminum chloride (AlCl 3) flocculant in wastewater treatment process results in high content of aluminum (17.92%) and low calcium content (2%) in sewage sludge.P.I 42.5 Portland cement produced from Fushun …
The objective of this paper is to comprehensively explore the effect of NaOH on the fly ash and metakaolin-based geopolymers concrete, highlighting their mechanical strength and potential challenges. In this study the fly ash was replace with 0%, 10%, 20%, 30% and 40% of metakaolin at 1 M, 3 M, 5 M and 7 M of NaOH molar concentration to …
XRF analysis of the ordinary Portland cement and RHA is reproduced in Table1.The mean specific gravity of RHA, sand, and Portland cement was 2.45, 1.74, and 3.11 g/cm 3, respectively.The BET surface area of RHA was found to be 165 m 2 /g. The particle size of RHA was calculated from SEM images (Fig. 1 a as an example) and …