Investigation of the durability of eco-friendly concrete material incorporating artificial lightweight fine aggregate and pozzolanic minerals under dual sulfate attack

2021 ◽  
pp. 130022
Author(s):  
Yating Zhang ◽  
Yuan Hua ◽  
Xingyi Zhu
Keyword(s):  
Sulfate Attack ◽  
Fine Aggregate ◽  
Concrete Material

scholarly journals The Acoustical Properties of the Polyurethane Concrete Made of Oyster Shell Waste Comparing Other Concretes as Architectural Design Components

2018 ◽  
Vol 31 ◽  
pp. 05001
Author(s):  
Erni Setyowati ◽  
Gagoek Hardiman ◽  
Purwanto
Keyword(s):  
Architectural Design ◽  
Coarse Aggregate ◽  
Oyster Shell ◽  
Fine Aggregate ◽  
Portland Cement Concrete ◽  
Concrete Material ◽  
Acoustical Properties ◽  
Architectural Acoustics ◽  
Shell Waste ◽  
Building Designs

This research aims to determine the acoustical properties of concrete material made of polyurethane and oyster shell waste as both fine aggregate and coarse aggregate comparing to other concrete mortar. Architecture needs aesthetics materials, so the innovation in architectural material should be driven through the efforts of research on materials for building designs. The DOE methods was used by mixing cement, oyster shell, sands, and polyurethane by composition of 160 ml:40 ml:100 ml: 120 ml respectively. Refer to the results of previous research, then cement consumption is reduced up to 20% to keep the concept of green material. This study compared three different compositions of mortars, namely portland cement concrete with gravel (PCG), polyurethane concrete of oyster shell (PCO) and concrete with plastics aggregate (PCP). The methods of acoustical tests were conducted refer to the ASTM E413-04 standard. The research results showed that polyurethane concrete with oyster shell waste aggregate has absorption coefficient 0.52 and STL 63 dB and has a more beautiful appearance when it was pressed into moulding. It can be concluded that polyurethane concrete with oyster shell aggregate (PCO) is well implemented in architectural acoustics-components.

scholarly journals Analysis of The Mechanical Properties of Concrete Based on Fly Ash and Palm Oil Clinkers

2021 ◽  
Vol 1 (4) ◽  
pp. 31-35
Author(s):  
L Opirina ◽  
Azwanda Azwanda ◽  
R Febrianto
Keyword(s):  
Fly Ash ◽  
Palm Oil ◽  
Strength Test ◽  
Fine Aggregate ◽  
Concrete Composition ◽  
Conventional Concrete ◽  
Concrete Material ◽  
Compressive Strength Test ◽  
Concrete Mix ◽  
Main Material

Concrete is the result of a mixture of cement, aggregate and water. Under certain conditions, the concrete mixture can be added with additives and admixture to get the concrete as needed. Cement is the most important material in the manufacture of conventional concrete. When cement is produced, the same amount of CO2 will also be generated as a side effect and pollute the atmosphere. Fly ash as an alternative to cement will be introduced as an alternative concrete material to reduce the use of cement in the concrete mix. In addition to the use of charcoal fly ash as a partial substitute for cement, this study also uses palm oil clinkers as a substitute for fine aggregate as much as 20%. This replacement material is an industrial waste which has the main content of silica and alumina which is similar to the main material for forming concrete. In addition, the use of these two materials also aims to reduce the exploration of the use of natural materials. This research introduces 3 kinds of concrete composition. The grouping is based on the ratio of fly ash and cement used, namely (60%:40%), (70%:30%) and (80%:20%). The test object used is a concrete cylinder with a diameter of 150 mm and a height of 300 mm. Tests were carried out at the age of 28 days of concrete. The compressive strength test showed that the best concrete was produced from the combination of the addition of 60% fly ash of coal aged 28 days, which was 4.21 MPa.

scholarly journals Analysis Of Use Sea Sand as A Fine Aggregate Replacement To Strong Press Concrete

2021 ◽  
Vol 1 (3) ◽  
pp. 1-6
Author(s):  
Fachrul Arya Sanjaya ◽  
Sapto Budy Wasono ◽  
Diah Ayu Restuti Wulandari
Keyword(s):  
Compressive Strength ◽  
Building Material ◽  
Fine Aggregate ◽  
River Sand ◽  
Concrete Material ◽  
Sea Sand ◽  
Concrete Cylinders ◽  
Compressive Strength Of Concrete ◽  
Average Compressive Strength

Concrete is a composite building material made from a combination of aggregate and cement. The limitation of concrete material, in this case, is a fine aggregate (river sand). The utilization of sea sand as an alternative to fine aggregate in the manufacture of concrete is     motivated by the availability of sea sand in nature in very large quantities. This study aims to determine the comparison and how much the compressive strength of concrete produced when using sea sand. The test was carried out when the specimens were 7, 14, and 28 days old with the specimens used in this study were concrete cylinders with a diameter of 15 cm and a height of 30 cm. The results showed that the use of sea sand as a substitute for fine aggregate showed an average compressive strength in 7 days of 18.86 MPa, an average compressive strength of 14 days of 25.52 MPa, an average compressive strength of 28 days of 29.00 MPa. Then for the average compressive strength value of the use of river sand in 7 days is 17.17 MPa, the average compressive strength of 14 days is 23.24 MPa, the average compressive strength of 28 days is 26.41 MPa.

scholarly journals Performance of Photocatalytic Concrete Blended with Artificial Sand and Iron Shavings

2020 ◽  
Vol 8 (5) ◽  
pp. 2254-2260
Keyword(s):  
Fine Particles ◽  
Solid Material ◽  
Fine Aggregate ◽  
Natural Sand ◽  
Conventional Concrete ◽  
Concrete Material ◽  
Alternative Material ◽  
Land Sliding ◽  
Photocatalytic Concrete

Summary: This paper deals in the midst effect of M-sand usage instead of fine aggregate, TiO2 and iron shavings in terms of volume of concrete to improve the tensile nature of the concrete material. At present larger part of the structures built with solid material namely concrete. Concrete is a composite material arranged by including pounded rocks as course total, normal sand burrowing from conduits as fine total ,bond or lime as restricting material and adequate measure of water at specified extents to shape gel. Nowadays the quality of natural sand is degrading and digging at higher depth in water ways leads to land sliding etc. The atmosphere is being polluted due to the harmful gases and toxic byproducts that are released during the production of cement. The present research deals with finding the alternative material for minimizing the problems caused by fine aggregate and binding material. In this context, we are working by means of the stand-in of usual sand by means of manufacture sand producing from crushing of larger boulders into fine particles of required size in cubical shape in various percentages such as 20%, 40%. … (Volume batching) till occurring optimum percentages. At M-sand optimum percentage, we are partially replacing TiO2 instead of cement in various percentages such as 4%, 8%… in addition to that we are adding Iron shavings to concrete volume to improve tensile nature of the conventional concrete

scholarly journals Testing of Nutmeg Shell as a Normal Concrete Material in Terms of Volume Weight and Compressive Strength Value

2021 ◽  
Vol 21 (3) ◽  
pp. 129-138
Author(s):  
Keyword(s):  
Compressive Strength ◽  
Specific Gravity ◽  
Concrete Aggregate ◽  
Fine Aggregate ◽  
Normal Concrete ◽  
Concrete Material ◽  
Average Value ◽  
Volume Weight ◽  
Compressive Strength Of Concrete

Normal concrete uses fine aggregate and coarse aggregate with concrete density 2200 kg/m3-2400 kg/m3 with a compressive strength of about 15-40 MPa [1]. The purpose of this study is to determine characteristics of the concrete aggregate and the compressive strength of the concrete design based on the DOE (Department of Environment) method and the SNI Standard. In this research, the use of nugmet shell was varied as follows: 0%, 0,25%, 0,50%, 0,75% and 1% of the cement weight. The results showed that the use of nutmeg shells as a normal concrete affected the specific gravity and the value compressive strength of concrete. The higher the percentage of nutmeg shells, the lower the specific gravity and compressive strength of the concrete. The average value of density to nutmeg shell concrete (NSC) 2254.72 (kg/m3) and normal concrete 2304.32 (kg/m3). The compressive strength of normal concrete is 224.2 kg/cm2 and the nutmeg shell concrete (NSC) the composition of 0.25% and 0.5% obtained by 129.6 kg/cm2 and 140.0 kg/cm2 increases the use of nutmeg shell 0.75% and 1% obtained value ​​of 117.6 kg/cm2 and 118.1 kg/cm2 decreased at the age of 28 days. The compressive strength of normal concrete 22 MPa while the maximum nutmeg shell concrete (NSC) 14 MPa, so it does not meet the quality of normal concrete in general.

scholarly journals Investigation on Mechanical and Durability Properties of Concrete Mixed with Silica Fume as Cementitious Material and Coal Bottom Ash as Fine Aggregate Replacement Material

Buildings ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 44
Author(s):  
Tariq Ali ◽  
Abdul Salam Buller ◽  
Fahad ul Rehman Abro ◽  
Zaheer Ahmed ◽  
Samreen Shabbir ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Silica Fume ◽  
Negative Impact ◽  
Bottom Ash ◽  
Sulfate Attack ◽  
Fine Aggregate ◽  
Waste Products ◽  
Coal Bottom Ash ◽  
Durability Performance

Cement production produces a high amount of carbon dioxide, which has a negative impact on the environment. By utilizing waste products instead of cement, environmental degradation can be reduced. The current study was undertaken to study the mechanical and durability performance of concrete by replacing 7.5%, 10%, and 12.5% silica fume (SF) of cement weight. Additionally, coal bottom ash (CBA) was also substituted as fine aggregates with 10%, 20%, and 30%. Compressive strength and indirect tensile strength were the major parameters regarding mechanical properties, while corrosion analysis and sulfate attack were set for durability performance. Sixteen mixes were prepared including a control mix. Out of these, three mixes contained SF, three mixes contained CBA, and eight mixes contained both SF and CBA with 1:2:4 ratio at 0.5 w/b ratio. The results concluded that the addition of 12.5% SF and 30% CBA gives optimum compressive strength and tensile strength. Furthermore, using the SF and CBA reduces the workability of concrete. Furthermore, the use of these byproducts increased the durability in terms of corrosion and sulfate attack.

Sign in / Sign up

Export Citation Format

Share Document