Sandcrete blocks comprise of natural sand, water and binder. Costs of alternative methods of acquiring sandcrete blocks for walling lawal1 p. The poverty level amongst west african countries and particularly nigerian has made these blocks. Pdf sandcrete blocks comprise of natural sand, water and binder. A study on the durability of solid sandcrete blocks samuel sunday omopariola department of works and services, the federal polytechnic, ilaro, nigeria. A study on the engineering properties of sandcrete blocks. Costs of alternative methods of acquiring sandcrete blocks. The architect should always attempt to design buildings using the nominal dimensions to the nearest halfblock size to reduce waste and labor due to cut blocks. This indicates that these blocks are below the standard for loadbearing sandcrete blocks and cannot be used as load bearing walling units. Pdf compressive strength of sandcrete blocks orjinta.
This research investigated and compared the strength of manual with machine compacted sandcrete hollow blocks using dangote and elephant ordinary portland cement brands in nigeria. The effectiveness and obstructs of sandcrete and concrete block in a foundation system abstract it is a clear fact that bricks play a vital role in a foundation system of a building. The load carrying capacity of hollow sandcrete blocks. Sandcrete blocks and quality management in nigeria. Comparing compressive strength of sandcrete blocks made. Properties of concrete concrete is an artificial conglomerate stone made essentially of portland cement, water, and aggregates. Pdf effects of curing on the compressive strengths of. The idea is making you see reasons why you must be tact in choosing your materials as a builder, contractor, client or consultant. Pdf sandcrete blocks and quality management in nigeria. Sandcrete blocks are produced from a lean mix of portland cement, natural sand and water and are the main masonry unit used in the urban and periurban areas of nigeria, west africa and many parts of the developing world. Arimanwa, michael c, arimanwa, chinenye e, okere, chioma t. On this post, im going to explain the concept of cement block manufacture and i hope youre going to learn a lot from it. This has necessitated producers of sandcrete blocks to produce blocks with low opc content that will be affordable to people and with much gain.
The fine aggregate was replaced with crushed waste sandcrete block cwsb in various percentages in the steps of 10 starting from. Comparison of locally excavated sand with river sand in terms of strength in sandcrete blocks. The concrete block is designed so that when the wall or edifice is installed, rebar can be placed within the core of the cinder block to reinforce the structure. Sandcrete blocks have been in used in many nations of the world including nigeria, playing a major role in the building industry. Compressive strength of sandcrete blocks in bosso and shiroro areas of minna, nigeria m. School latrine design cont ventilation to avoid odour. This paper is laboratory testfocused, and reports the results of investigation of the strength and density of sandcrete blocks based on a 1. Pdf optimum compressive strength of hardened sandcrete. Abdullahi civil engineering department, federal university of technology minna, niger state, nigeria. A critical observation of the various steps involved in using the sandcrete blocks and the interlocking a comparison of the nonvalue adding steps associated with sandcrete block wall construction to those. Sandcrete blocks and quality management in nigeria building industry m.
These blocks are intended for use in buildings, including walls, partitions, fences. One of the most expansive and diverse of solus ceramics collections, this series brings together. Pdf characterization of the compressive strength of sandcrete. The material constituents, their mix, presence of admixtures and the manufacturing process are important factors that determine the properties of sandcrete blocks. This study considered the effects of curing on the compressive strength property of 150mm thick sandcrete blocks produced by commercial block industries in calabar south eastern nigeria.
Unlike other masonry units such as concrete blocks and burn bricks which are used in other civil engineering infrastructure. Comparison of locally excavated sand with river sand in. Sandcrete is usually used as hollow rectangular blocks similar to concrete masonry units. The strength at ages 7, 14, and 21 days were 43%, 75%, and 92% of the 28day strength respectively. Physicomechanical behaviour of sandcrete block masonry. Physicomechanical behaviour of sandcrete block masonry units.
Sandcrete block is the principal wall unit in nigeria as well as other african countries. Abstract 100mm and 125mm solid blocks are extensively used for building construction at idiroko area of ogun state in nigeria and environ with no record of known available data. What are the various types of sandcrete hollow blocks. Many firms in the business of manufacturing sandcrete blocks in ikorodu and its environs use sand from various sources in the production of these blocks. Enhancing the strength of sandcrete blocks using coarse. The idea here is not to condemn the use of manually molded sandcrete blocks.
The coststability of this material has been a major issue in the world of construction where cost is a major index. Assessment of the quality of sandcrete blocks in use in owerri imo state, southeast nigeria joan i. The recycling of steel chips into an environmentally friendly, responsive, and profitable commodity in the manufacturing and construction industries is a huge and difficult challenge. I will go ahead and talk about the advantages of buying an engine vibrated sandcrete blocks for your project. Cement, as a binder, is the most expensive input in to the production of sandcrete blocks. Sandcrete is usually used as hollow rectangular blocks similar to concrete masonry units, often 45 centimetres 18 in wide, 15 centimetres 5. Compressive strength and costs of sandcrete blocks and. Compressive strength of sandcrete blocks in bosso and. Sandcrete is a yellowwhite building material made from a binder typically portland cement. Sandcrete blocks form the major walling material in the construction of building structures.
What links here related changes upload file special pages permanent link. Sakrete is an industry leader in construction products and has been the pros choice for concrete and mortar mix since 1936. Summary active bibliography cocitation clustered documents version history 4, suitability of sawdust ashlime mixture for production of sandcrete hollow blocks. University of nigeria research publications name obodoh, dominic anosike pgm. Experimental procedures carried out on aggregates and sandcrete blocks included sieve analysis to. Sandcrete blocks and bricks are masonry units manufactured from a mixture of cement, sand and water, and it plays a crucial role in the building construction. Sandcrete block manufacturing and testing the constructor.
This study was carried out to investigate the strength properties of sandcrete. The objective of the study was to find out whether the strength of the traditional sandcrete blocks could be enhanced without necessarily increasing the cement content by introducing a percentage of coarse aggregates in the batching of the constituents of the sandcrete blocks. Abstract this paper investigates the strength characteristics of sandcrete blocks in. Concrete is an indispensable material of construction of civil. Properties of concrete while cement in one form or another has been around for centuries, the type we use was invented in 1824 in britain. With their beautiful naturalsandstone appearance, these classic stone precast concrete stepping stones have endless uses around your homeas stepping stones, patios, barbecue pads, grasstogarden borders, lawn accents and more. A mathematical model for prediction of the strength of sandcrete cement block a mathematical model for prediction of the strength of sancrete cement block application of henry scheffes and osadebes concrete optimisation theory abstract sandcrete blocks are prismatic units manufactured from lean sand cement mortar mixes and are the. Wenapereand ephraim 2009 found that the compressive strength of sandcrete blocks increased with age of curing for all mixes tested at the watercement ratio of 0. Production process and necessary tests performed on both raw materials and sandcrete blocks are discussed in the following sections. Their compressive strengths determined to check for conformity with standard sandcrete block as specified in the. Theoretical framework quality is defined as fitness for purpose or compliance with specification anosike, 2011, taylor, 2002 the totality of features required by a product or service to. Sandcrete blocks are largely used for load bearing and nonload bearing walls and foundations.
These hollow cores, which come in sets of either two or three, take up approximately 50 percent of the blocks total volume. Sandcrete blocks are masonry units made use of in all types of masonry constructions. Compressive strength of manual and machine compacted. Pdf over 90% of physical infrastructures in nigeria are being constructed using sandcrete blocks making it a very important material in building. A concrete with compressive strength of 30nmm2 at 28 days hydration period was designed for normal mixture as the control.
Sandcrete blocks, when properly produced, meet bs 2028 1968 recommendations for density. Strength properties of commercially produces sandcrete blocks in ado ekiti, akure and ile ife nigeria adeyeye adewale olufisayo 41, unity avenue, agbado station, ogun state abstract. This paper is out to investigate the compressive strength of sandcrete blocks manufactured with. Blocks shall have a density calculated by dividing the mass of the block by the overall volume in the range 1,500 kgm3 to 2,160 kg m3. Thirty two 32 samples were moulded from the two brands of cement i. Compressive strength of hollow sandcrete blocks in range of 0. Establishing the compressive strength of sandcrete blocks produced in the central region, ghana.
Pdf establishing the compressive strength of sandcrete. Every necessary procedures and cautions for good masonry wall units were ensured with 25 strokes of blow for sound compaction. Concrete blocks also come in halfsizes, which are helpful in reducing the need to cut blocks in the field at corners or the end of walls. This research work means to determine the different properties of sandcrete blocks moulded with a locally excavated sand, in terms of compressive strength, durability and cost and economic importance, and that of river sand. The natural collection consists of tile ranges that provide a realistic and often more practical porcelain alternative to genuine natural stone. Sandcrete blocks were made with lateritic soil taken from different sources replacing the conventional fine aggregate local river sand in steps of 10% up to 60%. Also uniaxial compressive strength of hollow sandcrete blocks is defined on the. Advantages of engine vibrated sandcrete blocks over.
Assessment of the quality of sandcrete blocks in use in. The construction of structures is a regular operation which heavily involves sandcrete blocks for load bearing or nonload bearing walls. Standard for sandcrete blocks emerged as the latest standard reference document for sandcrete block production in nigeria. This paper examines the quality of machinevibrated hollow sandcrete blocks used on. And also that the strongness and weakness of a building depends solidly on the methods employed in moulding the bricks which are used in laying the foundation of a building.
The paper assesses the quality of sandcrete blocks in some selected areas of alimosho. The popularity of sandcrete blocks and their extensive application as walling material in nigeria and other developing countries cannot be overemphasised. Thus, opcchapla ternary blended cement sandcrete could be used for various civil engineering and building works. A study on the engineering properties of sandcrete blocks hollow sandcrete blocks containing a in many parts of nigeria, sandcrete block is the major cost after removal from the machine moulds, the blocks are. Sandcrete solus ceramics free bim object bimobject.
Compression tests on hollow sandcrete blocks are conventionally confined to the ascast face neglecting the other two orthogonal faces. I abstract alternative methods of building material production without compromising on quality have become vital to researchers lately. Page 37 compressive strength of binary and ternary blended cementsandcrete and soilcreteblocks containing sawdust ash. Mest standard child friendly wash facilities in schools in. Blocks shall be of work size 190 mm high, 390 mm long and 290 mm190 mm140 mm 90 mm thick, and shall be solid unless detailed otherwise. The blocks are then transported into a curing room or location where they are cured by steam or open air drying after watering for a period of time. Cement, as a binder, is the most expensive input in to the production of. Sandcrete manufacture could be for solid blocks, hollow blocks. Optimum compressive strength of hardened sandcrete building blocks with steel chips. Other documents intended for the regulation of the quality of sandcrete blocks used for buildings in nigeria include nbc 2006 and nis 2004. Experimental datasets on compliance level to minimum standard. This research work means to determine the different properties of sandcastle blocks moulded with a locally excavated sand, in terms of compressive strength, durability and cost and economic importance, and that of river sand.
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