Effect of replacement of lateritic soils with granite fines on the compressive and tensile strengths of laterized concrete

Osunade, J.A.

doi:10.1016/s0360-1323(01)00049-x

Cited by 26 publications

(12 citation statements)

References 4 publications

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“…According to Olusola (2005) LATCON refers to concrete in which the fi ne aggregate (sand) has been totally or partly replaced with laterite; total replacement is referred to as terracrete. Neville (2006) reported that a total replacement of sand with laterite in concrete production can rarely be stronger than 10 MPa (10 N mm −2 ), whereas studies by Ata (2007), Olusola (2005) and Osunade (2002) have proven that laterite can produce concrete of much higher grades. Major uncertainties concern the use of laterite as a construction material.…”

Section: Review Of Related Literaturementioning

confidence: 96%

Green economy and innovation: compressive strength potential of blended cement cassava peels ash and laterised concrete

Agbenyeku

Okonta

2014

African Journal of Science, Technology, Innovation and Developm

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This work highlights the incorporation of two locally available materials, cassava peels ash (CPA) and laterite, in concrete production for construction purposes. The abundance of these materials in West Africa paved the way for this study. The effect of partial substitution of cement with an agricultural waste (CPA) on the compressive strength of laterised concrete (LATCON) was investigated. Physical and chemical tests on CPA and laterite revealed them to have satisfactory characteristics for concrete production. A total of 192 cubic specimens of 100 mm dimensions were cast and cured by complete submergence in water for 7, 14, 21 or 28-day hydration periods, adopting a 28-day targeted strength of 25 N mm −2 as the control. The ordinary portland cement/CPA and sand/laterite replacement ratios ranged from zero to 30% with a view to determining the best compositions matrix. The density and compressive strength performance decreased with increase in the CPA and laterite content. However, gradual strength development in the CPA-LATCON was observed as the hydration period increased. The 28-day density and compressive strength of standard concrete was 2 385 kg m −3 and 27.05 N mm −2 , whereas those of the 10% CPA + 10% laterite sample (i.e. the best replacement matrix) were 2 322 kg m −3 and 25.57 N mm −2 , respectively. The strength of the CPA-LATCON (25.57 N mm −2 ) was higher than the targeted strength of 25 N mm −2 after hydration for 28 days, which makes it suitable as a building material. As such, it can be adopted in the construction of simple foundations and masonry units as a reliable alternative to the scarce and expensive conventional materials for prime cost reduction in rural housing and development without compromising standards.

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Section: Review Of Related Literaturementioning

confidence: 96%

Green economy and innovation: compressive strength potential of blended cement cassava peels ash and laterised concrete

Agbenyeku

Okonta

2014

African Journal of Science, Technology, Innovation and Developm

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“…A quantity of laterite ranging from 10 -30% is recommended for a replacement of natural sand in concrete [21,22], especially when a volumetric mix of 1:1.5:3 (cement; sand; gravel) is to be used. Unfortunately, adding large amounts of laterite to concrete may negate the strength development in concrete, because laterite contains fine clay materials.…”

Section: Introductionmentioning

confidence: 99%

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Awoyera

Dawson

Thom

et al. 2017

Construction and Building Materials

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Using industrial wastes and local materials as artificial aggregates in cement based materials remains a relevant measure for conservation of natural sources. In this study, novel cementitious mixes containing pulverized ceramic blended cement, ceramic aggregate and laterite were systematically combined to produce cement mortars. The mortar specimens were cured in water for a maximum of 28 days. At maturity, nondestructive tests, X-ray CT scan and Ultrasonic pulse velocity, were performed on hardened mortars. Thereafter, a series of predefined properties, namely dry bulk density, compressive and flexural strength, water absorption coefficient (due to capillary) of the hardened mortars were determined. Finally, in order to understand the hydration mechanism of the materials as it relates to the strength properties, microscale tests, SEM and XRD, were used to examine the fragments of the selected mortars. From the results, a mortar sample containing 10% ceramic powder and 100% ceramic aggregate as replacements for cement and sand respectively, gave higher strength values than the reference and other mixes.Microstructural analysis of the best mix revealed that it has larger proportions of ettringite, portlandite and calcite than the reference mix, and this could be responsible for the strength 2 gained. Thus, despite the apparent low reactivity of crushed ceramic material, this can improve bonding in cement-based mixture, when used at an appropriate concentration.

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“…Neville [16] reported that laterite when used to wholly replace sand in concrete can rarely produce concrete stronger than 10 MPa (10 N/mm 2 ). Report of studies by Osunade [25], Ata [26] and Olusola [5] has proved this is not true; they submitted that laterite can produce concrete of much higher grades. An earlier report of initial work on this study [10] presented volcanic ash showing 20%LAT/20%VA as having 67% pozzolanicity index at 28-day.…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of Curing Age and Mix Composition on Compressive Strength of Volcanic Ash Blended Cement Laterized Concrete

Olawuyi¹,

Olusola

Babafemi

2012

ced

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This study investigates the influence of curing age and mix proportions on the compressive strength of volcanic ash (VA) blended cement laterized concrete. A total of 288 cubes of 100mm dimensions were cast and cured in water for 3, 7, 28, 56, 90 and 120 days of hydration with cement replacement by VA and sand replacement by laterite both ranging from 0 to 30% respectively while a control mix of 28-day target strength of 25N/mm 2 (using British Method) was adopted. The results show that the compressive strength of the VA-blended cement laterized concrete increased with the increase in curing age but decreased as the VA and laterite (LAT) contents increased. The optimum replacement level was 20%LAT/20%VA. At this level the compressive strength increased with curing age at a decreasing rate beyond 28 days. The target compressive strength of 25N/mm 2 was achieved for this mixture at 90 days of curing. VA content and curing age was noted to have significant effect (α 0.5) on the compressive strength of the VA-blended cement laterized concrete.

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Effect of replacement of lateritic soils with granite fines on the compressive and tensile strengths of laterized concrete

Cited by 26 publications

References 4 publications

Green economy and innovation: compressive strength potential of blended cement cassava peels ash and laterised concrete

Green economy and innovation: compressive strength potential of blended cement cassava peels ash and laterised concrete

Suitability of mortars produced using laterite and ceramic wastes: Mechanical and microscale analysis

Influence of Curing Age and Mix Composition on Compressive Strength of Volcanic Ash Blended Cement Laterized Concrete

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