Water Demand Ratio And Loss On Ignition Of Fly Ash

compressive strength increased with increasing fly ash-to-aggregate ratio (FA/A). However, the increase in FA/A resulted in higher water requirements, lower flow, and longer setting times.

Water retainability of fly ash increases when %LOI of fly ash increases due to the porous and rough-texture particles. Therefore, high LOI fly ashes increase the water requirement of the …

Fly ash, the largest component of FAGC, belongs to Class F and purchased from the Ningdong power plant. To determine the properties of the fly ash, XRF and SEM analyses were carried out. ... Water demand ratio(%) Loss on ignition(%) Fly ash: 2.284: 8.6: 90.2: 87.2: 1.8: The length of fiber used was 3 mm, 6 mm, 12 mm and 18 mm respectively, with ...

Fly ash adopts grade III fly ash, with a fineness of 17%, a moisture content of 0.2%, a loss on ignition of 5%, and a water demand ratio of 105%. All indicators have reached national standards. The silica fume is produced by a processing plant in Shanxi. The gravel(G) from a stone factory in Quzhou, Zhejiang Province, where the coarse aggregate is

High calcium fly ash, ladle furnace slag, and limestone filler were investigated as supplementary cementitious materials in cement pastes, and binary mixtures were produced at 10%, 20%, and 30% cement replacement rates for each material. ... Perkin Elmer, Waltham, MA, USA). The loss on ignition (LOI) and the chloride, sodium, and sulfate ion ...

The paper presents research performed to report the effect of high-lime (Class C) fly ash on water demand, workability, time of set, and compressive strength of concrete. Tests were carried out on nominal 3000, 4000, and 5000 psi structure grade concrete utilizing fly ash produced at Wisconsin Electric Power Company's Pleasant Prairie Power Plant. Fly ash …

The first mix containing 0% fly ash (control) was made with water-to-cement (w/c) ratio of 0.5, and it gave a slump of 30mm and a 28-days strength of 22.22N/mm 2.

On the other hand, unburned carbon present in the fly ash can affect concrete consistency. An increment in the loss on ignition (LOI) of the fly ash increases the water requirement for a given consistency [26]. The same carbon cellular particles which affect the water content also affect the air content, making it necessary to increase the air

Test results indicate that the concretes made with high-LOI (8%) fly ash can be successfully produced for structural concrete, which contains fly ash of up to 60% of the total cementitious...

This study investigates the feasibility of using raw fly ash with a high loss on ignition in concrete. The fly ash-free concrete samples were prepared with different water-to-binder (w/b) ratios of 0.35, 0.40, and 0.45, whereas the fly ash concrete samples were prepared with a constant w/b of 0.40 and with various fly ash contents (10%, 20%, and 30%) as a …

The fly ash used in this study is a raw material with the loss on ignition of 15.8%, which is much higher than the upper limitation of 6% as stipulated by ASTM C618. Eight concrete mixtures were designed with different water-to-binder ratios of 0.35 and 0.45.

Coal Combustion. Isabel Suárez-Ruiz, Colin R. Ward, in Applied Coal Petrology, 2008. 4.5.1 Carbon in Fly Ash. Though the inorganic fraction of fly ash is the desired product for most industrial uses, fly ash carbon is the primary factor that determines whether the fly ash can be used, especially in cement and concrete industries. As noted, fly ash is used as a replacement …

To address these issues, in recent years, a few research works have been conducted on influence of various parameters such as binder type (i.e., fly ash, GGBS, palm oil fuel ash, ultrafine fly ash ...

Pervious concrete is recommended, which is of great benefit to the ecological environment and human living environment. In this paper, the influences of five water-cement ratios and four fly ash contents to replace the cement by mass with a water-cement ratio of 0.30 on the properties of Recycled Aggregate Pervious Concrete (RAPC) were studied.

An increment in the loss on ignition (LOI) of the fly ash increases the water requirement for a given consistency [26]. ... Although these non compliant fly ashes could have an effect on concrete water or admixture demand, it is evident they have a positive effect as a cementitious material and can be used in different concrete applications [28 ...

There are two group mixtures with different water-to-binder ratios of 0.35 and 0.45. In each group, fly ash is used to replace 10%, 20%, and 30% cement. Test results indicate …

The hydration exothermic rate of fly ash concrete is significantly affected by the initial concreting temperature and water-binder ratio. Firstly, the adiabatic temperature rise and temperature ...

Presents research performed to report the effects of high-lime (Class C) fly ash on water demand, workability, time of set, and compressive strength of concrete.

Incorporation of high loss-on-ignition fly ash into high-strength mortar: Influence on short-term engineering properties ... The mortar mixtures were designed with a constant water-to-binder ratio of 0.24 and the 0–60% high LOI FA was used to replace cement (step increment of 15% by weight). ... the demand for construction materials for ...

A large amount of fly ash with a high loss on ignition (over the maximum allowance value stipulated by ASTM C618) is being released and increasing daily in Vietnam.

3.4.1 Properties of artificial high LOI fly ash 28 3.4.1.1 Loss on ignition 28 3.4.1.2 Water retainability 30 3.4.2 Basic and mechanical properties of high LOI fly ash concrete 31 3.4.2.1 Slump 31 ... 6.2.2 C on trolled water to binder ratio 74 6.3 Effect of fly ash content on compressive strength of high LOI 76

This study investigates the feasibility of using raw fly ash with a high loss on ignition in concrete. The fly ash-free concrete samples were prepared with different water-to-binder (w/b) ratios ...

Fly ash is considered as one of the largest generated industrial solid wastes or so-called industrial by-products, around the world particularly in China, India, and USA. ... iv Loss on ignition ...

Water demand ratio (%) – 84: Loss on ignition (%) 4.14: 6.2: 2.1.2. ... For both C20 and C30 grades and different pore water saturations of fly ash concrete, the variation in compressive strength and in rebound value appeared identical with the changes in the level of fly ash replacement. The compressive strength reached the maximum when the ...

A total of nine concrete mixtures, eight incorporating fly ash and one control, were made. The ratio of fly ash to (fly ash+cement) was 55% 1 by mass. The water-to-cementitious materials ratio ranged from 0.34 to 0.39 for fly ash concrete …

High Volume Fly Ash (HVFA) concrete enables the utilization of fly ash (FA) to diminish greenhouse gas emission by decreasing the demand of ordinary Portland cement.

F fly ash, natural sand, and water. Fly ash is used as a fine aggregate to partially replace sand in cement mortars. Table I shows the physical properties of the materials, while Table II shows the chemical compositions of the cement and fly ash. The fly ash was a class F fly ash with low calcium oxide (CaO) content.

1:3 (wood ash: cement) in mass – higher water demand of wood mix; due to the irregular particle shape, high porosity and higher loss-on-ignition: Coal fly ash – Wang et al. (2008c) Concrete: 25%: wood fly ash does not reduce water amount; due to its irregular particles shape: Coal fly ash/other wood fly ash – Wang et al. (2008b) Mortar

Engineering, Technology & Applied Science Research Vol. 14, No. 4, 2024, 15226 -15 232 15227 Thuy et al.: Effects of High Loss on Ignition Fly Ash as a Partial Replacement for Sand ...

There are two group mixtures with different water-to-binder ratios of 0.35 and 0.45. In each group, fly ash is used to replace 10%, 20%, and 30% cement. Test results indicate that raw fly ash …