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Aggregates - Portland Cement Association

Aggregates, which account for 60 to 75 percent of the total volume of concrete, are divided into two distinct categories--fine and coarse. Fine aggregates generally consist of natural sand or crushed stone with most particles passing through a 3/8-inch sieve. Coarse aggregates are any particles greater than 0.19 inch, but ...

comparative analysis of the compressive strength of ... - CiteSeerX

1 Mar 2013 ... mended when natural aggregate is not easily available, high strength of concrete is not required and the ... which are not serviced by the river. Thus the cost of transporting gravel to the areas outside the catchment. Nigerian Journal of Technology. Vol. .... use crushed bricks as natural coarse aggregate par-.

Assessment of Strength Characteristics of Concrete Made from ...

19 Oct 2015 ... Aims: The aim of this research is to verify the suitability of local gravel aggregates obtained from the Southern part of Akwa Ibom State for designed concrete production in place of crushed granite aggregate sourced from distance places at exorbitant cost. This paper assesses the strength characteristics of ...

cost effectiveness of replacing sand with stonedust ... - IOSR Journals

Keywords: Compressive Strength, Concrete, Cost, Crushed Granite Fine, Sand. I. Introduction ... parts in the South-West Nigeria, major sources of sand used as fine for concrete are the river beds especially, the ... producing concrete by replacing sand with Crushed Granite Fine, i.e, stone-dust ( a by-product of rock-crushing.

Optimization of the Strength of Concrete Made From Nigerian ... - irjes

Abstract:- This paper aims to optimize the strength of concrete produced with concrete made from Nigeria processed ... crushed rock aggregates from six (6) sites in two different locations; three (3) samples each from Abakaliki in. Ebonyi state ... of concrete cost minimization or other optimization problem (De Larrard, 200).

Use of Crushed Granite Fine as Replacement to River Sand in ...

24 Dec 2010 ... The use of rock dust as an alternative to natural sand was also reported by [5]. The use of up to 20% quarry waste fine as a partial replacement for natural sand in the production of concrete, in Malaysia was also reported [6]. Use of crushed granite fines or crushed rock fines as an alternative to sand in ...

Types of Aggregates and Applications < Technical information ...

Types of Aggregates and Applications < Technical information < Aggregates : Lafarge Ukraine - Lafarge, building better cities. World leader ... Granite aggregates are crushed hard rock of granular structure, being the most common on Earth. .... The cost of products from slag concretes is 20-30% lower than traditional ones.

Crushed stone - Wikipedia

Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from gravel which is produced by natural processes of weathering and erosion, and typically has a more rounded shape ...

an investigation into structural strengths of laterized concrete

Fine aggregate is gen- erally natural sand and is graded from particles size of 5 mm down to the finest ... reductions in the cost of concrete manufacture [1, 12, 13]. ... Niger State, Nigeria. The coarse aggregate used was crushed gravel of 25 mm maximum size obtained from Yarmuk Nigeria Limited quarry site along Paiko -.

Assessment of Strength Characteristics of Concrete Made from ...

Full-text (PDF) | Assessment of Strength Characteristics of Concrete Made from Locally Sourced Gravel Aggregate from South-South Nigeria. ... the Southern part of Akwa Ibom State for designed concrete production in place of crushed granite. aggregate sourced from distance places at exorbitant cost. This paper assesses ...

COST EVALUATION OF PRODUCING DIFFERENT AGGREGATE ...

N22,241,000. These translate to 122% profit for A and 219% profit for B. It is recommended that the cost price of granite aggregates in Nigeria can be reviewed to make it reachable for masses. This will eradicate the use of natural gravels that are not free from clays coating and other fine materials that could affect hydration ...

Engineering properties of concrete made from gravels obtained in ...

27 Mar 2017 ... The following factors have influences on future demand of gravel in Nigeria; population growth, personal income, statewide economic growth, state ... granular materials derived from natural rocks, crushed stones, or natural gravels and sand, in addition to their use as economical filler, aggregates generally ...

Aggregates from Natural and Recycled Sources - USGS ...

Significant technological aspects of natural and recycled aggregates. ... to supplement natural aggregates (derived from crushed stone, sand .... Cost data were developed from representative industry data. Appreciation is conveyed to Russel Hawkins of Allied Recy- cled Aggregates, Larry Horwedel of Excel Recycling &.

Aggregates Business Europe - Rapid rise for African aggregate ...

Despite current dwindling mineral commodity prices, Africa's growth continues to be reinforced by the natural resources sector, which underpins the rising fiscal ... As a result, Nigeria's aggregates industry is expected to further grow as local suppliers ramp up production to close the widening gap between supply and rising ...

Characterization of ceramic waste aggregate concrete - ScienceDirect

2 Dec 2016 ... Ceramic waste aggregates (CWAs) used in this study (Fig. 1a) were mainly ceramic floor and wall tiles, obtained from construction and demolitions sites within Ota and Lagos, Nigeria. The ceramic waste pieces were crushed and sieved into required aggregate sizes (Fig. 1b), using a mechanical metal ...

assessment of palm kernel shells as aggregate in concrete and ...

State, Nigeria. Abstract: Palm kernel shells were assessed as aggregate in concrete and laterite blocks. Results showed that laterite blocks reinforced with kernel shells at the optimum proportion of 1:4 (kernel ... However due to the exorbitant cost of steel, cement and crushed stone aggregate (which include energy and.

Rock strength, Engineering properties, aggregates, pavement ...

5 Feb 2012 ... Keywords Rock strength, Engineering properties, aggregates, pavement, Basement Complex, SE Nigeria. 1. Introduction. Natural construction aggregate is one of the most abundant natural resources and one of the most widely used. Construction aggregate is the sized, or crushed and sized, rock material ...

comparative cost and strength analysis of cement and aggregate

2 Jul 2012 ... Department of Civil Engineering, University of Nigeria, Nsukka, Nigeria. ... to compare the strength and cost of seven various cement replacement materials(rice husk ash, groundnut husk ash, palm oil ... shell ash); six aggregate replacement materials (palm kernel shell, quarrydust, crushed spent fire bricks ...

Comparison of Some Strength Properties of Concrete ... - THE IJES

30 Sep 2014 ... Department of Civil Engineering, College of Engineering, University of Agriculture Makurdi, Nigeria ... recommended as good substitutes to natural crushed granite aggregate for production of structural concrete. It ... concrete production, drainage and work and block work for low-cost housing [1].

Paul Okeke - University Of Nigeria Nsukka

25 Jul 2014 ... In this work, models for predicting six structural characteristics and cost of sand- quarry dust blocks were ..... full or partial replacement for natural sand in concrete, sandcrete block and in soilcrete block ..... weathering of rocks and include sand, gravel, and crushed rock such as granite, basalt, sandstone ...

crushed concrete as a source of aggregate for new concrete

use of waste materials as aggregates for concrete. Critical shortage of natural aggregate for concrete production is developing in many regions. The needs for better methods of solid waste disposal and probably energy conservation have contributed to the increased interest in this technology. In Nigeria and most other third ...

Engineering properties of concrete made from gravels obtained in ...

20 Feb 2017 ... Nigeria; population growth, personal income, statewide economic growth, state infrastructural needs and personal interest. Gravel, like other natural resources occurs where nature placed it, not where ... derived from natural rocks, crushed stones, or natural gravels and sand, in addition to their use as.

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