Influence and Possibility of Using Limestone Dust Replacement of Sand for Sustainability in Concrete Production

Author(s):  
Nuttawut Intaboot ◽  
Kriangkrai Chartboot

This paper aimed to assess the potential of using limestone dust to replace sand at levels of 0, 20, 40, 60, 80 and 100% by weight. Concrete mix design for cement : fine aggregate : coarse aggregate was 1: 2 : 4 and 0.40, 0.50, 0.60 water-to-cement ratios were used. The study started by testing the basic properties of the material. The compressive strength test was done with curing for 7, 14, 21 and 28 days and modulus of elasticity of concrete at 28 days, after which the microstructural properties of concrete modified with limestone dust were investigated. The study found that the concrete had better workability when increasing the limestone dust content. The incorporation of 40% limestone dust at 0.50 water-to-cement ratios was found to improve the compressive strength of the concrete and resulted in the maximum compressive strength. However, high levels of replacement lead to porous microstructures. Moreover, the use of limestone dust in concrete production tends to be more cost-effective. Therefore, the results of this research seemingly provide confirmation and support for the utilization of these waste materials by reducing the use of natural resources. Further, it is a goal of local governments to help promote the value of limestone dust for future use.

Author(s):  
Barkha Verma

Abstract: Aggregates provide volume at low cost, comprising 66% to 78% of the concrete. With increasing concern over the excessive exploitation of natural and quality aggregates, the aggregate produced from industrial wastes and agricultural wastes is the viable new source for building material. This study was carried out to determine the possibilities of using coconut shells as aggregate in concrete. Utilizing coconut shells as aggregate in concrete production not only solves the problem of disposing of this solid waste but also helps conserve natural resources. In this paper, the physical properties of crushed coconut shell aggregate were presented. The fresh concrete properties such as the density and slump and 28 days compressive strength of lightweight concrete made with coconut shell as coarse aggregate were also presented. The findings indicate that water absorption of the coconut shell aggregate was high about 24% but crushing value and impact value were comparable to that of other lightweight aggregates. The average fresh concrete density and 28days cube compressive strength of the concrete using coconut shell aggregate 1975kg/m3 and 19.1 N/mm2 respectively. It is concluded that crushed coconut shell is suitable when it is used as a substitute for conventional aggregates in lightweight concrete production. Keywords: Coarse Aggregate, Cement, Concrete, Fly Ash, Coconut shell Aggregate, Water, Compressive Strength, Workability, Fine Aggregate.


Author(s):  
Muh. Sayfullah S ◽  
Musrifin Musrifin

This study aims to determine the characteristics of fine aggregate material characteristics originating from Rongi Village, Sampolawa Subdistrict, coarse aggregate originating from Badene Village, Batauga Subdistrict, and to determine the compressive strength produced by concrete against the mixture of materials using fine aggregate originating from Rongi Village and coarse aggregate comes from the Badene Village of Batauga District. In this study the material was mixed using water with a cement water factor of 0.59. The compressive strength test is carried out at the age of 3 days, 7 days and 28 days, with a slinder size of 15cm x 30cm. The sample of specimens in this study amounted to 15 pieces. From the results of tests carried out the compressive strength value of the concrete produced using fine aggregate material derived from Rongi Village and coarse aggregate originating from the Village of Sangatene that is an average at 3 days of 94.5 kg / cm2, age 7 days is 119.6 kg / Cm2, and age 28 days is 192.5 kg / cm2. Based on the results of the compressive strength test shows that the compressive strength value obtained is increasing with increasing age of the treatment of the test specimens.


2020 ◽  
Vol 13 (2) ◽  
pp. 93
Author(s):  
Ikrar Hanggara, ST., MT

The practice of steel lathing by students of Mechanical Engineering State Polytechnic of Malang produces an abundant amount of steel fiber waste. In this research steel fiber was utilized to substitute coarse aggregate in fiber concrete mixture. The purpose of this research is to find out the compressive and flexure strengths of fiber concrete carried out at Material Laboratory Civil Engineering Politeknik Negeri Malang, and to estimate the cost. The required data were of the results of coarse aggregate and fine aggregate tests, and physical cutting of steel lathing waste. Mix design concrete referred to SNI 03-2834-2000. Compressive strength test used 54 cylindrical specimens of Ø15 x 30cm varied at 0%, 5%, and 10% substitutions. Tests were carried out on concrete aged 7, 14, and 28 days. The flexural strength test used 6 beam specimens of 15 x 15 x 60cm varied at 0%, 5%, and 10% substitution. Tests were carried out on 28 days of concrete. The experiment resulted in 39.01 Mpa  compressive strength at 0% variation; 24.54  Mpa  compressive strength at 5% variation; 21.80 Mpa  compressive strength at 10% variation; in 3.87 Mpa  flexure strength at 0% substitution; 4.27 Mpa  flexure strength at 5% substitution; 4.07 Mpa  flexure strength at 10% substitution. The greatest result of flexure strength test occured at 5% variation; at Rp.940,276/m3 at 0% variation and at Rp.938,719/m3 at 5% variation or 0.2 % decrease. Key word : Steel lathe waste, compressive strength, flexure strength


2021 ◽  
Vol 14 (2) ◽  
pp. 30
Author(s):  
Armin Naibaho ◽  
Agus Sugiarto ◽  
Purnama Dewi

Abstract The use of the mountain seal used as a building block for concrete should be considered, based on current usage apart from being a light construction material for housing, mountain materials from these two places are used as the main aggregate material for building construction, water structures (dams), roads. and bridges located in the surrounding Malang-Kota Batu area To determine the size of the aggregate, the coarse aggregate is sieved using a vibrating sieve, while the fine aggregate is sieved by a hydraulic sieve. In the screening process, about 70% of the filtered must pass so that high efficiency and capacity can be achieved. The compressive strength test results obtained the average compressive strength value at 28 days of concrete for concrete with fine aggregate sand zone III and coarse aggregate (gravel) in the Batu City area is equivalent to 35.65 MPa. The results of the split tensile strength test showed that the average split strength value at the age of 28 days for concrete with fine aggregate sand zone III and coarse aggregate (gravel) in the Kota Batu area is equivalent to 2.51 MPa. The compressive strength value for normal concrete is 35.65 MPa, it should produce split tensile strength = 4.179 MPa according to the provisions of SNI T-15-1991-03 Article 3.2.5 (fr = 0.70√fc '). Even though the split tensile strength value obtained in the laboratory is only 2.51 MPa, this means that the quality of materials (sand and broken stone) from Batu City is not suitable for use as building materials. Because the number 2.51 MPa is relatively much smaller than the value of 4.179 MPa, it is only one of the factors outlined in the SNI T-15-1991-03 article 3.2.5. Keywords: Mountain Material, Concrete, Concrete Compressive Strength Test, Concrete Tensile Strength Test


2020 ◽  
Vol 14 (2) ◽  
pp. 30
Author(s):  
Armin Naibaho ◽  
Agus Sugiarto ◽  
Purnama Dewi

Abstract The use of the mountain seal used as a building block for concrete should be considered, based on current usage apart from being a light construction material for housing, mountain materials from these two places are used as the main aggregate material for building construction, water structures (dams), roads. and bridges located in the surrounding Malang-Kota Batu area To determine the size of the aggregate, the coarse aggregate is sieved using a vibrating sieve, while the fine aggregate is sieved by a hydraulic sieve. In the screening process, about 70% of the filtered must pass so that high efficiency and capacity can be achieved. The compressive strength test results obtained the average compressive strength value at 28 days of concrete for concrete with fine aggregate sand zone III and coarse aggregate (gravel) in the Batu City area is equivalent to 35.65 MPa. The results of the split tensile strength test showed that the average split strength value at the age of 28 days for concrete with fine aggregate sand zone III and coarse aggregate (gravel) in the Kota Batu area is equivalent to 2.51 MPa. The compressive strength value for normal concrete is 35.65 MPa, it should produce split tensile strength = 4.179 MPa according to the provisions of SNI T-15-1991-03 Article 3.2.5 (fr = 0.70√fc '). Even though the split tensile strength value obtained in the laboratory is only 2.51 MPa, this means that the quality of materials (sand and broken stone) from Batu City is not suitable for use as building materials. Because the number 2.51 MPa is relatively much smaller than the value of 4.179 MPa, it is only one of the factors outlined in the SNI T-15-1991-03 article 3.2.5. Keywords: Mountain Material, Concrete, Concrete Compressive Strength Test, Concrete Tensile Strength Test


UKaRsT ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 1
Author(s):  
Budi Tri Cahyono ◽  
Rio Rahma Dhana

ABSTRACTIn this increasingly advanced era, the more development is carried out, the increasing scale of development. It shows more and more concrete needs in the future. The purpose of this study is to find out and analyze the addition of water hyacinth fiber as a mixture on concrete. Data analysis methods begin with the investigation of cement material, fine aggregate, coarse aggregate, and water hyacinth material. Concrete is added with water hyacinth fiber with addition variations of 0%, 1%, 3% and 5%. Test object used in the form of a cylinder with size ø 15 cm x 30 cm. Concrete mix design uses ASTM method. In the process of making water hyacinth fiber begins with cutting the water hyacinth by 3-5 cm, then milling it into fiber. The next step is drying into the sun and then into the oven at 150ºC. From the results of the research conducted at the Civil Engineering Laboratory of Lamongan Islamic University, the results showed that there was a decrease in strength in the variation of the addition of water hyacinth 1% and 3% but experienced an increase in the 5% variation. It is known that the correlation of concrete compressive strength at 28 days is 0% at 86.27 Kg/cm2, 1% at 60.66 Kg/cm2, 3% at 55.27 Kg/cm2 and 5% at 57.97 Kg/cm2.Keywords: water hyacinth, concrete, compressive strength.


2021 ◽  
Vol 2 (2) ◽  
pp. 141-149
Author(s):  
Johan Oberlyn Simanjuntak ◽  
Tiurma Elita Saragi ◽  
Ros Anita Sidabutar ◽  
Humisar Pasaribu ◽  
Rido Parulian Simbolon

The need for housing is increasing day by day. This is a factor in the visit to the need for concrete as a housing construction material. The more concrete that is produced, the more cement is needed for the construction. Concrete is a composite material (mixture) of several materials, the main ingredient of which consists of a mixture of cement, fine aggregate, coarse aggregate and water. Utilization of waste tire ash in the concrete mix is one of the alternative uses so that ic can ultimately increase the efficiency of cement savings which takes a long time to increase in high prices. With reference to this, this study uses used waste as a cement additive with a mixture composition of 0%, 3%, 6% and 9%. The test specimens were made using a cylinder with a diameter of 15 cm and a height of 40 cm with 48 specimens produced. The results of the compressive strength test of normal concrete (25.45 MPa), while the concrete with a mixture of 3% used tire ash (28.15 MPa), 6% used tire ash mixture (23.46 MPa) and 9% used tire ash mixture (18.60 MPa). From this research, it can be said that compressive strength of concrete using 3% ash produces the greatest compressive strength of 28.15 MPa.


Author(s):  
Nandy Candra ◽  
Whendy Trissan

Plastic bottle is waste that can be utilized. This research is used as additive in concrete mixtures can provide an alternative to Utilize the waste. Such as waste plastic bottles PET (Polyethylene Terephthalate). Optimizing the utilization of waste plastic bottles PET (Polyethylene Terephthalate) is expected to reduce the waste that pollutes the environment and provide added value.The fiber to be used as an additive in concrete mixtures. The fibers are mixed with fine aggregate, water and PPC cement type I gresik brands. Concrete mix design using SNI 03-2843-2000 about how making plans mixture of normal concrete. Tests using a cylinder measuring 10 cm x 20 cm, each variation using 10 samples consisting of five variations (0%, 5%, 10%, 15%, 20%) and tested at 14 and 28 days in Laboratory Studies Engineering Education building the Faculty of Education University of Palangkaraya.Average compressive strength at 14 days for variations of coarse aggregate mixture of chopped plastic bottle 0%, 5%, 10%, 15% and 20%, respectively for 23:02 MPa; 12:35 MPa; 10.49 MPa; 9.6 MPa; 8.83 MPa. Average compressive strength at 28 days for variations of coarse aggregate mixture of chopped plastic bottle 0%, 5%, 10%, 15% and 20%, respectively for 25.77 MPa; 13.62 MPa; 11.84 MPa; 10.8 MPa; 10:28 MPa


2020 ◽  
Vol 5 (2) ◽  
pp. 59-71
Author(s):  
Sri Devi Nilawardani

Title: The Effect of Using Mediteran Soil as Cement Substitution Materials in Compressive Strength and Tensile Strength of Concrete Concrete is a composite material (mixture) of cement, fine aggregate, coarse aggregate, and water. The potential of limestone in Indonesia is very large, reaching 28.678 billion tons which is the main ingredient in the cement manufacture. In the long run it will be depleted because it is a non-renewable natural resources. So to reduce the use of limestone the utilization of Mediteran soil as a substitution for some cement in the manufacture of concrete is required. The initial idea is based on the chemical composition contained in the Mediteran soil almost identical to the cement, which is carbonate (CaO) and silica (SiO2). The purpose of this research is to reveal the influence of substitution of Mediteran soil by 20% and 40% in the compressive strength and tensile of the concrete at age 3, 7, 14, and 28 days with the number of test specimen each 3 pieces on each variation in 10cm x20cm cylinder with planning of concrete mixture refers to SK SNI method T-15-1900-03. The type of research used is quantitative with the experimental method of laboratory test and data analysis of comparative method and regression. The results show that compressive strength and tensile strength of concrete using Mediteran soil substitution comparable to  the strength of normal concrete with dry treatment. In the composition of 20% Mediteran soils decreased by 51.35% or 7.9 MPa (compressive strength) and 30.60% or 0.93 MPa (tensile strength). While the composition of 40% Mediteran soil decreased by 43.78% or 9.13 MPa (compressive strength) and 2.24% or 1.31 MPa (tensile strength).  


This paper presents an experimental investigation on the properties of concrete in which like cement is partially replacing by used nano silica and is partially replacing by used waste foundry sand. Because now a day the world wide consumption of sand as cement and as fine aggregate in concrete production is very high. Nano silica and waste foundry sand are major by product of casting industry and create land pollution. The cement will be replaced with nano silica and the river sand will be replaced with waste foundry sand (0%, 5%, 10%, 15%, 20%). This experimental investigation was done and found out that with the increase in the nano silica and waste foundry sand ratio. Compression test has been done to find out the compressive strength of concrete at the age of 7, 14, 21, and 28. Test result indicates in increasing compressive strength of plain concrete by inclusion of nano silica as a partial replacement of cement and waste foundry sand as a partial replacement of fine aggregate.


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