Long-term compressive strength and some other properties of controlled low strength materials made with pozzolanic cement and Class C fly ash

2006 ◽  
Vol 137 (1) ◽  
pp. 261-266 ◽  
Author(s):  
S. Türkel
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Class C ◽  
Low Strength ◽  
Pozzolanic Cement

Research on Barite Concrete Mixed with Fly Ash

2013 ◽  
Vol 275-277 ◽  
pp. 2107-2111
Author(s):  
Qiu Lin Zou ◽  
Jun Li ◽  
Zhen Yu Lai
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Compressive Strength ◽  
High Temperature ◽  
Fly Ash ◽  
Apparent Density ◽  
Cycle Times ◽  
Residual Compressive Strength ◽  
Temperature Performance

Barite concrete with density grade of 3 and strength grade of C30 was prepared by mixing with different fineness of fly ash. The workability, mechanical properties and long-term high temperature performance of the prepared barite concrete were researched. Results show that the workability of barite concrete is improved by mixing with fly ash, and no segregation of mixture has been observed. The apparent density and 3d, 28d compressive strength of barite concrete are decreased obviously after mixing with fly ash. But with the increasing of the fineness of fly ash, the apparent density and 3d, 28d compressive strength of barite concrete have a slight increase. High temperature residual compressive strength is decreased with the increasing of temperature. The cycle times of heat treatment at 400°C only has a little effect on residual compressive strength of barite concrete.

scholarly journals Experimental study on the properties of highperformance concrete made with class C fly ash

2019 ◽  
Vol 276 ◽  
pp. 01014
Author(s):  
I Made Alit Karyawan Salain ◽  
I Nyoman Sutarja ◽  
Teguh Arifmawan Sudhiarta
Keyword(s):  
Experimental Study ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Fly Ash ◽  
Permeability Coefficient ◽  
Splitting Tensile Strength ◽  
Type I ◽  
Fine Aggregate ◽  
Hydration Time ◽  
Class C

This experimental study presents the properties of highperformance concrete (HPC) made by partially replacing type I Portland cement (OPC) with class C fly ash (CFA). The purpose of this study is to examine, with hydration time, the development of the compressive strength, the splitting tensile strength and the permeability of HPC utilizing different quantity of CFA. Four HPC mixtures, C1, C2, C3, and C4, were made by utilizing respectively 10%, 20%, 30% and 40% of CFA as replacement of OPC, by weight. One control mixture, C0, was made with 0% CFA. The mix proportion of HPC was 1.00 binder: 1.67 fine aggregate: 2.15 coarse aggregate with water to binder ratio 0.32. In each mixture, it was added 5% silica fume and 0.6% superplasticizer of the weight of the binder. Tests of HPC properties were realized at the age of 1, 3, 7, 28, and 90 days. The results indicate that CFA used to partially replace OPC in HPC shows adequate cementitious and pozzolanic properties. The compressive strength and the splitting tensile strength of HPC increase while the permeability coefficient decreases with increasing hydration time. It is found that the optimum replacement of OPC with CFA is 10%, however the replacement up to 20% is still acceptable to produce HPC having practically similar harden properties with control mixture. At this optimum replacement and after 90 days of hydration, the compressive strength, the splitting tensile strength and the permeability coefficient can reach 68.9 MPa, 8.3 MPa and 4.6 E-11 cm/sec respectively. These results are 109%, 101%, and 48% respectively of those of control mixture.

Effect of Partial Replacement of Fly Ash by Metakaolin on Strength Development of Fly Ash Based Geopolymer Mortar

2017 ◽  
Vol 744 ◽  
pp. 131-135 ◽  
Author(s):  
Muhammad Zahid ◽  
Nasir Shafiq ◽  
Mohd Fadhil Nuruddin ◽  
Ehsan Nikbakht ◽  
Asif Jalal
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Sodium Hydroxide Solution ◽  
Base Material ◽  
Sodium Silicate Solution ◽  
Silicate Solution ◽  
Partial Replacement ◽  
Strength Development ◽  
Class C ◽  
Class F

This article aims to investigate the compressive strength variation by the addition of metakaolin as a substitute of fly ash in the fly ash based geopolymer mortar. Five, ten and fifteen percent by weight of fly ash was replaced by highly reactive metakaolin. Two type of fly ashes namely, ASTM class F and ASTM class C were used as a base material for the synthesis of geopolymer mortar. Eight molar sodium hydroxide solution mixed with sodium silicate solution was used as alkaline activator. For optimum geopolymerization, mortar was cured at sixty degree Celsius for twenty four hours duration. Results show different behavior of metakaolin replacement on compressive strength for two different types of fly ash based geopolymer mortar. Improvement in compressive strength was seen by addition of metakaolin in ASTM class F fly ash based geopolymer. On the other hand compressive strength was decreased abruptly in fly ash class C based geopolymer up to certain replacement level.

EFFECT OF MIX PROPORTIONS ON THE PROPERTIES OF CLSM CONTAINING RECYCLED GLASS

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Pranshoo Solanki
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Moisture Content ◽  
Glass Powder ◽  
High Volume ◽  
Glass Content ◽  
Recycled Glass ◽  
Powder Density ◽  
Low Strength ◽  
Commercial Applications

This research examined the effect of mix proportions namely, water to cementitious (w/c) ratio and glass content, on the flowability and compressive strength of controlled low-strength (CLSM) mixtures. A total of 20 mixes containing different proportions of cement, sand, class C fly ash, coarser glass, finer glass and water were prepared and tested. Results showed that both flowability and strength are dependent on w/c ratio and type and percent of glass content. Strength of mixes containing high volume of coarser glass was found more sensitive towards w/c ratio. Further strength was found to improve with increase in finer portion of the glass powder. Density was also found to correlate well with the moisture content of CLSM specimens. Specimens with lower moisture content produced denser CLSM structure. The results of this study would be useful in establishing mix proportions for CLSM incorporating recycled glass, fly ash, sand and cement for commercial applications

scholarly journals Assessment of the influence of fly ash additive on the tightness of concrete with furnace cement CEM IIIA 32,5N

2017 ◽  
Vol 66 (4) ◽  
pp. 153-164
Author(s):  
Anna Szcześniak ◽  
Jacek Zychowicz ◽  
Adam Stolarski
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fly Ash ◽  
Concrete Strength ◽  
Concrete Compressive Strength ◽  
Water Penetration ◽  
Laboratory Investigations ◽  
Concrete Testing ◽  
Water Tightness

The analysis of influence of fly ash additive to concrete on the basis of cement CEM IIIA 32,5 N on the tightness and strength was presented in the paper. Researches were carried out for three types of concrete made with the use of CEM IIIA 32,5N LH HSR NA cement. The basic recipe of concrete does not contain the additive of fly ash, while two other concretes contain the fly ash additive in an amount of 25% and 33% of the cement mass. Laboratory investigations of the concrete samples were carried out under conditions of long-term maturation in the range of the water tightness and the depth of water penetration in concrete, compressive strength and tensile strength of concrete at splitting. Keywords: concrete testing, furnace cement, fly ash additive, water tightness of concrete, strength of concrete.

scholarly journals Effect of Carboxylic Acid (Benzene Crystallable) in Cement Concrete and Geopolymer Concrete

2020 ◽  
Vol 9 (7) ◽  
pp. 472-475
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Fly Ash ◽  
Carboxylic Acid ◽  
Geopolymer Concrete ◽  
Cement Concrete ◽  
Split Tensile Strength ◽  
Sealing Capacity ◽  
Time Period

The present study appraises the recitals of carboxylic acid- based admixture to increase concrete water tightness and self-sealing capacity of the cement and geopolymer concrete. Outcomes of the previous studies in particular, adding 1% by cement mass of the carboxylic polymer reasons for reduction in the water dispersion under pressure of 7-day wet cured concrete by 50% associated to that of the conforming reference concrete. At 7 days, M4 mix compressive strength is about 43.5% less than M3 mix. The compressive strength of M4 increases and is about 37.6% less than M3 mix at 28 days of curing. At 7 days, M4 mix split tensile strength is about 17.5% less than M3 mix (cement concrete with 0.45 w/c ratio). The split tensile strength of M4 declines and is about 42.3% less than M3 mix at 28 days of curing. The strength of the geopolymer concrete tends to increase as the time period increases due to the presence of fly ash in it. So it is expected that geopolymer concrete will give more strength than cement concrete in long term with the presence of carboxylic acid

Compressive strength of HPC containing CNI and fly ash after long-term exposure to a marine environment

2012 ◽  
Vol 34 (1) ◽  
pp. 110-118 ◽  
Author(s):  
H.Z. Lopez-Calvo ◽  
P. Montes-Garcia ◽  
T.W. Bremner ◽  
M.D.A. Thomas ◽  
V.G. Jiménez-Quero
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Marine Environment
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