Properties of high-strength concrete using a fine fly ash

Haque, M N; Kayali, Obada

doi:10.1016/s0008-8846(98)00125-2

Cited by 122 publications

(47 citation statements)

References 2 publications

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“…The average value of the 28-day tensile strength for the concretes made was about 4.85 MPa, which corresponds to 5.15 % of the compressive strength for the same concretes. Table 3 shows that the average ratio between the tensile strength (f sp ) to cube compressive strength (f ck ) of concrete at 28 days was lower than the range (of about 9-10 %) for medium strength concrete reported earlier (Neville 1997;Rasiah 1983;Haque and Kayali 1998). This indicates that as the compressive strength increases lower would be the ratio, which is consistent with the results published by other investigators earlier (Rasiah 1983;Haque and Kayali 1998;Yogendran et al 1987).…”

Section: Splitting Tensile Strengthmentioning

confidence: 63%

“…Table 3 shows that the average ratio between the tensile strength (f sp ) to cube compressive strength (f ck ) of concrete at 28 days was lower than the range (of about 9-10 %) for medium strength concrete reported earlier (Neville 1997;Rasiah 1983;Haque and Kayali 1998). This indicates that as the compressive strength increases lower would be the ratio, which is consistent with the results published by other investigators earlier (Rasiah 1983;Haque and Kayali 1998;Yogendran et al 1987). From the results it can be seen that similar to compressive strength the splitting tensile strength also exhibited the highest strength at MK 10 mixture.…”

Section: Splitting Tensile Strengthmentioning

confidence: 63%

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Effect of Metakaolin Content on the Properties of High Strength Concrete

Dinakar

Sahoo

Sriram

2013

Int J Concr Struct Mater

228

113

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This study presents the effect of incorporating metakaolin (MK) on the mechanical and durability properties of high strength concrete for a constant water/binder ratio of 0.3. MK mixtures with cement replacement of 5, 10 and 15 % were designed for target strength and slump of 90 MPa and 100 ± 25 mm. From the results, it was observed that 10 % replacement level was the optimum level in terms of compressive strength. Beyond 10 % replacement levels, the strength was decreased but remained higher than the control mixture. Compressive strength of 106 MPa was achieved at 10 % replacement. Splitting tensile strength and elastic modulus values have also followed the same trend. In durability tests MK concretes have exhibited high resistance compared to control and the resistance increases as the MK percentage increases. This investigation has shown that the local MK has the potential to produce high strength and high performance concretes.

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Section: Splitting Tensile Strengthmentioning

confidence: 63%

Section: Splitting Tensile Strengthmentioning

confidence: 63%

Effect of Metakaolin Content on the Properties of High Strength Concrete

Dinakar

Sahoo

Sriram

2013

Int J Concr Struct Mater

228

113

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“…This is typical of pozzolan cement concrete as the silica-lime reaction requires more water in addition to the water needed during hydration of cement (Hague and Kayali, 1998;Waswa-Sabuni et al 2002;Adesanya and Raheem, 2009a).…”

Section: Workabilitymentioning

confidence: 99%

Saw Dust Ash as Partial Replacement for Cement in Concrete

Raheem¹,

Olasunkanmi²,

Folorunso³

2012

OTMCJ

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o r g a n i z a t i o n , t e c h n o l o g y a n d m a n a g e m e n t i n c o n s t r u c t i o n · a n i n t e r n a t i o n a l j o u r n a l · 4(2)2012 474Saw dust ash, Pozzolan, Workability, Compressive strengthKeywords this research considered the use of saw dust ash as a pozzolan in the production of concrete. the study investigated the physical properties and chemical composition of saw dust ash (SDA) as well as the workability, and compressive strength properties of the concrete produced by replacing 5%, 10%, 15%, 20% and 25% by weight of ordinary Portland cement with SDA. Slump and compacting factor tests were carried out on the fresh concrete and compressive strength test on hardened concrete. The concrete cubes were tested at the ages of 3, 7, 28, 56 and 90 days. The results showed that SDA is a good pozzolan with combined SiO2, Al2O3 and Fe2O3 of 73.07%. The slump and compacting factor decreased as the SDA content increased indicating that concrete becomes less workable as the SDA content increased. The compressive strength decreased with increasing SDA replacement. The compressive strength of concrete with SDA was lower at early stages but improves significantly up to 90 days.An optimum value of 23.26N/mm2 at 90 days was obtained for concrete with 5% SDA replacement. It was concluded that 5% SDA substitution is adequate to enjoy maximum benefit of strength gain. Saw Dust Ash as Partial Replacement for Cement in Concrete INTRODUCTIONThere is need for affordable building materials in providing adequate housing for the teaming populace of the world. The cost of conventional building materials continue to increase as the majority of the population continues to fall below the poverty line. Thus, there is the need to search for local materials as alternatives for the construction of functional but low-cost buildings in both the rural and urban areas. Some of the local materials that have been used are earthen plaster (Svoboda and Prochazka, 2012), lateritic interlocking blocks (Raheem et al., 2012) and Palm kernel shell (Raheem et al., 2008).Continuous generation of wastes arising from industrial by-products and agricultural residue, create acute environmental problems both in terms of their treatment and disposal. The con-DOI 10.5592/otmcj.2012.2.3 Research paper 475 struction industry has been identified as the one that absorbs the majority of such materials as filler in concrete (Antiohos et al., 2005). If these fillers have pozzolanic properties, they impart technical advantages to the resulting concrete and also enable larger quantities of cement replacement to be achieved (Hossain, 2003). Appropriate utilization of these materials brings ecological and economical benefits.Saw dust is a waste material from the timber industry. It is produced as timber is sawn into planks at saw mills located in virtually all major towns in the country. This process is a daily activity causing heaps of saw dust to be generated after each day. The need to convert this waste product into a useful by-product is the fo...

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“…%, the bound water content increased and seemed to be slightly higher than with the control (S 0 ). This is principally attributed to the pozzolanic reactivity of the SDA with the released Ca(OH) 2 to form additional CSH [18,26,[39][40][41]. If the SDA content is more than 15 wt.…”

Section: Bound Water Contentmentioning

confidence: 99%

Saw Dust Ash Substitution for Cement Pastes-Part I

Darweesh¹,

El-Suoud²

2017

AJASR

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Abstract:The saw dust (SD) is often used as a fuel which in turn leads to the environmental pollution. So, it must utilize this waste into useful applications to avoid what is known as "air pollution". In this study, the SD was converted to saw dust ash (SDA) by its firing at 500°C. It is then used as a partial substitution for cement. The results showed that the water of consistency (WC), initial setting time (IST) and final setting time (FST) of the Portland cement pastes are decreased with the substitution of SDA due to the presence of Na-lignosulfonate. The bound water content (BW), bulk density (BD) and compressive strength (CS) increased with time of hydration up to 90 days, while the apparent porosity (AP) decreased. The BW, BD and CS of the cement pastes containing 5-15 wt. % SDA are slightly higher than those of the blank (S0) at all hydration ages. The free lime content (FL) of the Portland cement pastes (S0) increased as the hydration progressed onward, whereas the cement pastes with SDA (S1-S5) only increased up to 3 days and then decreased. The FTIR spectra of the OPC without SDA showed that the free lime content increased as the hydration proceeded till 90 days, while that of the optimum cement mix containing 15 wt. % SDA, the FL content increased only up to 3 days and then progressively decreased until nearly disappeared after 90 days.

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Properties of high-strength concrete using a fine fly ash

Cited by 122 publications

References 2 publications

Effect of Metakaolin Content on the Properties of High Strength Concrete

Effect of Metakaolin Content on the Properties of High Strength Concrete

Saw Dust Ash as Partial Replacement for Cement in Concrete

Saw Dust Ash Substitution for Cement Pastes-Part I

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