School of Infrastructure Process Engineering and Technology (SIPET)
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School of Infrastructure Process Engineering and Technology (SIPET)
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Item Strength Properties of Concrete Using Terrazzo Waste as Partial Replacement for Cement(Epistemics in Science, Engineering and Technology, 2020-04-10) YUSUF, Abdulazeez; H. O. Aminulai; B. E. MfonCement is regarded as the most expensive concrete ingredient. Reducing the quantity of cement used in concrete with Terrazzo Waste (TW), will reduce the cost of concrete and solve disposal and environmental challenges posed by TW. The effect of partial replacement of cement with TW in concrete was studied. The specific gravity, sieve analysis, water absorption, bulk density and moisture content tests were carried out on the aggregates. A terrazzo waste replacement of 0%, 10%, 20%, 30%, 40% and 50% by weight of cement was used to cast 150 x 150 x 150 mm concrete cubes as well as 500 x 100 x 100 mm concrete prisms. A mix ratio of 1:1.8:2.51 designed for an M30 concrete with water-cement ratio of 0.50 was used for all mixes. The weight of concrete increased with corresponding increase in the content of TW. Compressive and flexural strength tests were conducted on thirty-six (36) cubes and thirty-six (36) prisms after curing by full immersion for 7 and 28 days. The values of compressive strength ranged between 19.88 N/mm² to 37.63 N/m² while the flexural strength obtained range between 3.12 N/mm² and 4.52 N/mm² at 28days of curing. Different percentage replacement of TW satisfied different concrete grade requirement for structural design except for 50% replacement which recorded compressive strength of 19.88 N/mm². An optimum replacement level of %10 was recorded and the concrete is applicable for structural elements in buildings. Second order polynomial equations were developed for predicting compressive and flexural strength of concrete containing TW. Terrazzo waste was therefore recommended for use as a partial replacement for cement in concrete production.Item POTENTIALS OF DEKINA CASSAVA PEEL ASH IN CONCRETE PRODUCTION(3RD INTERNATIONAL CIVIL ENGINEERING CONFERENCE, 2024-02-28) Ismail, S. P; Kolo, D. N; YUSUF, AbdulazeezBasic conventional building materials like cement and aggregates are becoming increasingly expensive due to high cost incurred in their processes, production and transportation. The utilization of locally available materials such as cassava peel ash that can either reduce or replace the conventional ones is being considered. Following review paper summarizes the mechanical and durability characteristics of cassava peel ash compared with ordinary Portland cement. The cassava peel ash was obtained by calcinations of cassava peel to 7000 c temperature. The sample was investigated using XRS-FP Analysis, for evaluating the concentration of each component such as SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, K2O Na2O, LoI, the phase composition, mechanical and durability properties evolution. From this review is obvious that significant analytical techniques have been successfully carried out and a significant concentration of 81.14% was obtained. These analyses have shown that natural pozzolan based geopolymer has potential to be used as sustainable building materials. It was discovered that the cassava peel ash contains all the main chemical constituents of cement though in lower percentage compared with OPC which shows that it can serve as a suitable replacement if the right percentage is used. However, its durability and sulphuric acid resistance improved considerably at greater replacement of cement with cassava peel ash. The study recommends that concrete made with cassava peel ash can be used for light construction works where high strength is not major requirement but where durability is a major concern.Item OPTIMIZATION OF COMPRESSIVE STRENGTH OF PERIWINKLE SHELL CONCRETE USING SCHEFFE’S MODEL(3RD INTERNATIONAL CIVIL ENGINEERING CONFERENCE, 2025-02-28) Ibrahim A; Abbas., B.A; YUSUF, AbdulazeezThis study investigates the application of scheffe’s model in compressive strength optimization of periwinkle shell-coarse aggregate (PSCA) concrete. Physical properties of the aggregates such as specific gravity, bulk density, sieve analysis and workability of concrete were determined. Specific gravities of fine and coarse aggregates were 2.62 and 2.68 respectively, Moisture content for aggregate for fine and coarse aggregate were 7.08 and 3.03 respectively. The bulk densities were 1612.82kg/m3 and 1394.64kg/m3 respectively. From the sieve analysis test, the sand belonged to zone 2 and well graded with coefficient of gradation of 1.04. Ninety 150mm x150mm x 150mm cube specimens were produced for the compressive strength test. Model was fitted to data obtained on the compressive strength and mathematical model was developed based on Scheffe’s model. The formulated model was tested for adequacy at 95% level of confidence using t-statistic. The compressive strength of concrete was observed to decrease with increase in the percentage replacement of periwinkle shells (PS). The reduced value of the compressive strength may be due to lower specific gravity, water absorption capacity value of periwinkle shell compared to that of crushed granite. The blending of the two materials caused a reduction in strength value of the end product since specific gravity is strength related. The reduced compressive strength value may also be due to the fact that periwinkle shell has fewer binding properties compared to crushed granite. After 28 days of water curing, the concrete gave an average optimum compressive strength value of 25.78N/mm2 corresponding to a mix proportion of 1, 0.1, 1, 1.9 (cement, periwinkle shell, sand, granite) at a water-cement ratio of 0.4. This compressive strength value obtained at 5% replacement is within the recommended value required for plain concrete works, lean concrete, simple foundations, masonry walls and other simple construction works in low- cost housing constructionsItem Effect of Partial Replacement of Cement with Cow Dung Ash Using Bida Natural Coarse Aggregate(School of Environmental Technology, Federal University of Technology, Minna, 0022-10-05) Abbas, B. A.; YUSUF, Abdulazeez; Kolo, D. N; Aboje, A. A.; Mahmud, M.B.; Ndaiji, A. U.The research investigates the effect of partial replacement of cement with cow dung ash (CDA) in concrete production using Bida natural coarse aggregate. Water to cement ratio and mix ratio of 0.6 and 1:2:4 was adopted respectively. The aggregates used were characterized and the cow dung was calcined at a temperature between 400-500oC. Concrete was produced using CDA as cement replacement at 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40%. Slump of the freshly produced concrete was determined and the compressive strength of the hardened concrete was determined at 7, 21 and 28 days of curing. The sum of SiO2, Al2O3 and Fe2O3 in CDA exceeds the 70% minimum specified by ASTMC 618-12. The slump of the fresh concrete ranges from 0 – 40 mm while the compressive strength at 28 days curing duration ranges from 12.59N/mm2 19.29N/mm2 and density was 2323.95kg/m3– 2554.59kg/m3 respectively. The test results revealed that the compressive strength decrease with increase in CDA content and increase with curing age. The strength results indicate that there was no much significant difference between the control specimen with 0% CDA and that containing 5% CDA. This implies that concrete made using CDA as partial replacement for cement can be used for structural applications such as in the construction of reinforced concrete slabs, beams, columns and foundations. The study concluded that CDA has pozzolanic properties and can be used to replace up to 10% cement in concrete produced using Bida natural coarse aggregate.