Application of Fly Ash and Brick Dust as a Suitable Materials for Fine Aggregate in Self-Consolidating Concrete

2019 ◽  
Author(s):  
Phani N. Ramamurthy
Keyword(s):  
Fly Ash ◽  
Large Scale ◽  
Engineering Properties ◽  
Dry Density ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Skilled Workers ◽  
Construction Sites ◽  
Self Compacting Concrete ◽  
Natural Sand

Large-scale efforts are needed for conservation of natural sand whose resources are reducing day by day and legal complications are making it difficult to meet the demand. So, self-compacting concrete (SCC) is an innovative concrete that does not require vibration for placing and compaction. It is able to flow under its own weight, completely filling formwork and achieving full compaction, even in the presence of congested reinforcement. The hardened concrete is dense, homogeneous and has the same engineering properties and durability as traditional vibrated concrete. Complex shape of concrete structures and densely arranged bars make it more difficult to use a vibrator. Vibratory compaction is noisy and deleterious to the health of construction workers, as well as an annoyance to people in the neighborhood. In remote areas it is difficult to find skilled workers to carry out the compacting work at construction sites. This paper presents the progress of the research on different harden properties of Self Compacting Concrete using the Ordinary Portland Cement “Ultratek” made and low-calcium fly ash from Birla Glass, Kosamba, Gujarat, as binder materials in making the concrete mixes along with other ingredients locally available. Results indicated increase in workability for all the cases over control concrete. Concrete with fly ash was also found to be about 25% economical when cost per N/mm2 was compared. Based on experimental results correlations are developed to predict Compressive Strength, Flexural strength, cost, Slump and Dry Density for percentage sand replacement with fly ash. Available online at https://int-scientific-journals.com

scholarly journals Lightweight self-compacting concrete with sintered fly-ash aggregate

2018 ◽  
Vol 27 (3) ◽  
pp. 328-337
Author(s):  
Dorota Małaszkiewicz ◽  
Daniel Jastrzębski
Keyword(s):  
Fly Ash ◽  
Fresh Concrete ◽  
Strength Loss ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Self Compacting Concrete ◽  
Natural Sand ◽  
Concrete Properties ◽  
Slump Flow ◽  
Passing Ability

The article presents the results of research assessing the possibility of making LWSCC from the locally produced sintered fly ash aggregate CERTYD. Two methods of preliminary LWA preparation were applied: pre-soaking with water and coating with a film of cement paste. The following properties of fresh LWSCC were evaluated: slump-flow, time T500 and passing ability using L-Box. Partial replacement of natural sand by fine LW sand (0/0.5 mm) improved filling and passing abilities of fresh concrete, reduced slightly the bulk density, but it resulted in compressive strength loss by 12-18%. In terms of both fresh and hardened concrete properties it is more favorable to use only fine LW sand as natural sand replacement. Considering fresh concrete properties paste impregnation of LW aggregate is more efficient than saturation with water.

scholarly journals Water Absorption of Incorporating Sustainable Quarry Dust in Self-Compacting Concrete

2021 ◽  
Vol 945 (1) ◽  
pp. 012037
Author(s):  
A A Dyg Siti Quraisyah ◽  
K Kartini ◽  
M S Hamidah
Keyword(s):  
Water Absorption ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Concrete Durability ◽  
Self Compacting Concrete ◽  
Concrete Technology ◽  
Natural Sand ◽  
Conventional Concrete ◽  
Water Absorption Test ◽  
Quarry Dust

Abstract In construction industry nowadays, self-compacting concrete (SCC) is a concrete technology innovation which gives more benefits over conventional concrete. SCC was invented to improve concrete durability without using any vibrator while placing it into formwork. In order to conserve natural sand, quarry dust (QD) as a waste and sustainable material has been incorporated to replace fine aggregate in SCC. In this study, conventional concrete and quarry dust in self-compacting concrete (QDSCC) mixes consist of 0%, 10%, 20%, 30%, 40% and 50% QD were prepared. The workability test was conducted to determine the performance of fresh concrete and ensuring all the QDSCC properties follow the acceptance criteria for SCC. Meanwhile, the hardened concrete specimens were water cured for 7, 28 and 60 days to conduct water absorption test. This research aim is to determine water absorption of incorporating sustainable QDSCC. Thus, it resulted that 50% of QDSCC has achieved the lowest water absorption of QDSCC as compared to other dosages. Finally, sustainability in concrete technology can be promoted by incorporating QDSCC.

Effects of Incorporating Dune Sand as Fine Aggregate Replacement in Self-Compacting Concrete

2015 ◽  
Vol 668 ◽  
pp. 189-196 ◽  
Author(s):  
Enas Khattab
Keyword(s):  
Cement Content ◽  
Technical Specification ◽  
Maximum Size ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Dune Sand ◽  
Self Compacting Concrete ◽  
Natural Sand ◽  
Fine Aggregates ◽  
Hardened Properties

The aim of this study is to investigate the effects of incorporating dune sand as fine aggregates replacement in self-compacting concrete. Twelve mixes were cast and tested for both fresh and hardened properties. The mixes were divided into 2 groups: Each group comprised six mixes. The constituent materials were as follows: Normal Portland cement CEM Ι 42,5N, dolomite as coarse aggregates of maximum size 10 mm, medium-sized sand, silica fume was 10% by weight of cement. Coarse: fine aggregates ratio was 1:1. Admixture which complies with ASTM C494 Types G and F was used in the 12 mixes (3.5% by weight of cement ).Dune sand replaced natural sand by zero %,10%,25%,50%, 75%,and 100% respectively .For , the first group (Group A), the cement content was 350 Kg/m3, while for the second group (Group B), the cement content was 400 Kg/m3.Tests carried out on fresh self-compacting concrete were slump flow,T50cm ,V-funnel, V-funnel t5min ,and GTM screen stability test . Tests conducted on hardened concrete were compressive strength at ages 7 and 28 days, flexural, and splitting tensile strengths were also conducted at age 28 days. The obtained results showed that the fresh properties satisfied the Egyptian Technical Specification limits. Regarding the hardened properties, both 28 days compressive and flexural strengths exhibited improvement till 50% replacement when compared to their respective control mixes.

scholarly journals Cements with calcareous fly ash as component of low clinker eco-self compacting concrete

2019 ◽  
Vol 9 (1) ◽  
pp. 196-201
Author(s):  
Jacek Gołaszewski ◽  
Grzegorz Cygan ◽  
Tomasz Ponikiewski ◽  
Małgorzata Gołaszewska
Keyword(s):  
Fly Ash ◽  
Hardened Concrete ◽  
Self Compacting Concrete ◽  
Basic Properties ◽  
Ecological Self ◽  
Different Types ◽  
Hardened State ◽  
Main Component ◽  
New Generation ◽  
Good Workability

AbstractThe main goal of the presented research was to verify the possibility of obtaining ecological self-compacting concrete of low hardening temperature, containing different types of cements with calcareous fly ash W as main component and the influence of these cements on basic properties of fresh and hardened concrete. Cements CEM II containing calcareous fly ash W make it possible to obtain self-compacting concrete (SCC) with similar initial flowability to analogous mixtures with reference cement CEM I and CEM III/B, and slightly higher, but still acceptable, flowability loss. Properties of hardened concretes with these cements are similar in comparison to CEM I and CEM III concretes. By using cement nonstandard, new generation multi-component cement CEM “X”/A (S-W), self-compacting concrete was obtained with good workability and properties in hardened state.

Assessment of Chloride Ion Penetration of Alkali Activated Low Calcium Fly Ash Based Geopolymer Concrete

2016 ◽  
Vol 692 ◽  
pp. 129-137
Author(s):  
Shravan Kumar ◽  
Kolli Ramujee
Keyword(s):  
Fly Ash ◽  
Environmental Control ◽  
Carbon Dioxide Emission ◽  
Engineering Properties ◽  
Natural Seawater ◽  
Fine Aggregate ◽  
Chloride Ingress ◽  
Geopolymer Concrete ◽  
Chloride Permeability ◽  
Test Technique

Fly ash–based geopolymer concrete (GPC) comprised of fly ash, Fine aggregate, coarse aggregate, and an alkaline solution, which is a combination of sodium hydroxide and sodium silicate, can play a significant role with respect to environmental control of greenhouse effects. The reduction in the carbon dioxide emission from cement production can contribute significantly to global temperature reduction. Current studies on geopolymer concrete are primarily focused on geopolymer technology to prepare fly ash–based geopolymer concrete and its Engineering properties determination. However, no specific publications are available with respect to the durability of geopolymer concrete in the marine environment. Corrosion of reinforcing steel due to chloride ingress ion is one of the most common environmental attacks that lead to the deterioration of concrete structures. Therefore, wherever there is a potential risk of chloride induced corrosion, the concrete should be evaluated for chloride permeability. This paper describes an durability testing program, based on Rapid chloride permeability test technique to measure the chloride permeability of in-place concrete. To investigate the durability performance of geopolymer fly ash–based concretes and OPC concretes that have been subjected to natural seawater exposure. A series of 100x50mm specimen were cut from the 100x200mm cylinders of both GPC & OPC to fit them into the test set up. The test results indicated excellent resistance of the geopolymer concrete (GPC) to chloride ingress ion with a less charge passed through them relative to ordinary Portland cement (OPC concrete)

Study on the Influence of Mix Design Parameters on the Properties of Self-Compacting Concrete

2013 ◽  
Vol 857 ◽  
pp. 10-19
Author(s):  
Ji Liang Wang ◽  
Xiang Qian Wen ◽  
Jun Hong Shan ◽  
Ying Liu
Keyword(s):  
Fly Ash ◽  
Volume Content ◽  
Coarse Aggregate ◽  
Mineral Admixture ◽  
Design Parameters ◽  
Fine Aggregate ◽  
Test Results ◽  
Self Compacting Concrete ◽  
Volume Stability ◽  
Dry Shrinkage

the influence of mixing amount of mineral admixture, volume content of fine and coarse aggregate have been systematical studied on the workability, mechanical properties and volume stability of self-compacting concrete. Test results showed that with the fly ash content increased, the workability of self-compacting concrete improved significantly, early compressive strength decreased, but increase rate of later strength improved remarkably, and the mixing amount of fly ash inhibited significantly the dry shrinkage of self-compacting concrete; with the volume content of coarse aggregate increased, the workability of self-compacting concrete decreased significantly, but the volume stability of self-compacting concrete improved obviously, thus the optimum volume content of coarse aggregate of self-compacting concrete was range from 0.30 to 0.34; when the volume content of fine aggregate varied at the range of 0.40~0.50, there may be little effects on the workability of self-compacting concrete, but the increase self-compacting concretes volume content could reduce obviously the dry shrinkage of self-compacting concrete. Moreover, the variation in the volume content of coarse and fine aggregate should have slight influence on the early strength of self-compacting concrete, and the influence of the volume content variety on the later strength of self-compacting concrete could be neglected eventually.

Rice Husk Ash as Fine Aggregate Sustainable Material for Strength Enhancement of Conventional and Self Compacting Concrete

2016 ◽  
Vol 692 ◽  
pp. 94-103
Author(s):  
S.S. Samantaray ◽  
K.C. Panda ◽  
M. Mishra
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Fresh Concrete ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Self Compacting Concrete ◽  
Strength Enhancement ◽  
Slump Flow ◽  
Concrete Property

Rice husk ash (RHA) is a by-product of the rice milling industry. Near about 20 million tonnes of RHA is produced annually which creates environmental pollution. Utilization of RHA as a supplementary cementitious material adds sustainability to concrete by reducing CO2 emission of cement production. But, the percentage of utilization of RHA is very less. This paper presents the results of an experimental investigation to study the effects of partial replacement of fine aggregate with RHA on mechanical properties of conventional and self-compacting concrete (SCC). The fine aggregate is replaced by RHA in conventional concrete (CC) with six different percentage by weight such as 0%, 10%, 20%, 30%, 40% and 50% having w/c ratio 0.375 with variation of super plasticiser dose, whereas in SCC the replacement of fine aggregate by RHA is 0%, 10%, 20%, 30%, 40%. The design mix for CC is targeted for M30 grade concrete. The fresh concrete test of SCC is conducted by using slump flow, T500, J-ring, L-box, U-box and V-funnel to know the filling ability, flow ability and passing ability of SCC. As fresh concrete property concerned, the result indicates that the slump flow value satisfied the EFNARC 2005 guidelines upto 30% replacement of fine aggregate with RHA whereas 40% replacement did not satisfy the guideline. As hardened concrete property concerned, the compressive strength, split-tensile strength and flexural strength of CC and SCC are determined at 7, 28 and 90 days. The test result indicates that upto 30% replacement of fine aggregate with RHA enhances the strength in CC whereas the strength enhancement in SCC upto 20% replacement.

scholarly journals Physical and Chemical Properties of Waste Foundry Exhaust Sand for Use in Self-Compacting Concrete

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5629
Author(s):  
Maria Auxiliadora de Barros Martins ◽  
Lucas Ramon Roque da Silva ◽  
Maria Gabriela A. Ranieri ◽  
Regina Mambeli Barros ◽  
Valquíria Claret dos Santos ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Fine Sand ◽  
Economic Benefits ◽  
Hardened Concrete ◽  
Fine Aggregate ◽  
Physical And Chemical Properties ◽  
Self Compacting Concrete ◽  
X Ray ◽  
Physical And Chemical ◽  
And Chemical Properties

The reuse of waste in civil construction brings environmental and economic benefits. However, for these to be used in concrete, it is necessary a previous evaluation of their physical and chemical characteristics. Thus, this study aimed to characterize and analyze the waste foundry exhaust sand (WFES) for use in self-compacting concrete (SCC). Foundry exhaust sand originates from the manufacturing process of sand molds and during demolding of metal parts. It is a fine sand rich in silica in the form of quartz collected by baghouse filter. Characterization of WFES was conducted through laser granulometry, scanning electron microscopy (SEM) in the energy dispersive spectroscopy (EDS) mode, X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG) and derivative thermogravimetry (DTG) techniques. The waste was classified as non-hazardous and non-inert, with physical and chemical properties suitable for use in SCC composition, as fine aggregate or mineral addition. Five mixtures of SCC were developed, in order to determine the waste influence in both fresh and hardened concrete. The properties in the fresh state were reached. There was an increase in compressive strength and sulfate resistance, a decrease in water absorption of self-compacting concrete by incorporating WFES as 30% replacement.

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