scholarly journals CEMENT ADDITIVE USE REDUCTION FACTORS TO IMPROVING THE QUALITY CONCRETE BIOCONC

2019 ◽  
Vol 2 (2) ◽  
pp. 77-84
Author(s):  
Muhammad Chabibullah ◽  
Tony Hartono Bagio
Keyword(s):  
Environmentally Friendly ◽  
Reduction Factor ◽  
Green Technology ◽  
Cement Concrete ◽  
Normal Concrete ◽  
Concrete Mix ◽  
Concrete Quality ◽  
Technology Applications ◽  
Cement Additive ◽  
Modern Era

Technology applications in the concrete mix is ??growing very rapidly in this modern era to obtain concrete results with characteristics that are environmentally friendly and non-toxic. Bioconc is innovation in developing green technology with the insertion of a micro-gap or slit gradation mycelia microbe as a micro-filter to mengoptimalkanatau reduce the amount of cement concrete on the concrete mix in total will increase the efficiency in the concrete and reduce the material components of the most expensive in the concrete, the cement. in job mix additive Bioconc require R%, ie a reduction factor of cement that will determine how the dose of cement and dose additive Bioconc, and therefore to seek R% require some percentage of reduction factor of cement optimum ranging from the concrete Normal, 5%, 10%, 15%, 20%, 25%, 30%, 35%.? + 31271x? - 4709x³ - 233.1x² + 79.66x + 22:18, concrete quality obtained from normal concrete with fc '= 20 MPa generate optimum value reduction of cement amounted to 28.869%.

scholarly journals Green structure and green technology in preserving traditional architecture of Rumoh Aceh

2021 ◽  
Vol 881 (1) ◽  
pp. 012036
Author(s):  
M A Kevin ◽  
M Fuady ◽  
Izziah ◽  
E Wulandari ◽  
C Dewi
Keyword(s):  
Cultural Heritage ◽  
Secondary Data ◽  
Environmentally Friendly ◽  
Green Technology ◽  
Research Needs ◽  
Traditional Architecture ◽  
Descriptive Research ◽  
Qualitative Descriptive ◽  
Alternative Solutions ◽  
Modern Era

Abstract Rumoh Aceh is one of the traditional architectural house in Indonesia that has become a cultural heritage as well as the identity of Aceh region. Rumoh Aceh as a building has the value of sustainability and environmentally friendly, and also loaded with the values of local wisdom that exist in the lives of Acehnese people. Rumoh Aceh in its development has undergone various adjustment processes to the environment so that it can survive until now. But along with the development of modern era that demands efficiency and the fact of increasingly difficult to find good quality wood materials for the manufacture and maintenance of traditional architecture of Rumoh Aceh, then gradually fewer people build and maintain Rumoh Aceh. Although constrained in the difficulty of procurement of good quality wood materials and maintenance, the existence of Rumoh Aceh must be maintained. Therefore, this research needs to be done as an effort to understand the constraints of the availability of good quality wood materials for the manufacture and maintenance of traditional architecture of Rumoh Aceh and find alternative solutions that are environmentally friendly to support the preservation efforts of Rumoh Aceh. This qualitative descriptive research uses variety of primary and secondary data of traditional architecture of Rumoh Aceh. The results of this study revealed the use of green structures and technologies as well as environmentally friendly engineering wood materials can be one of the alternative solutions in preserving the traditional architecture of Rumoh Aceh.

scholarly journals PEMANFAATAN ABU KERTAS DAN SERBUK CANGKANG LOKAN PADA CAMPURAN BETON NORMAL DENGAN MENGGUNAKAN SIKACIM CONCRETE ADDITIVE

2021 ◽  
Vol 3 (4) ◽  
pp. 132-140
Author(s):  
Mulyati Mulyati ◽  
Wiki Yulandi
Keyword(s):  
Compressive Strength ◽  
Strength Test ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Compressive Strength Test ◽  
Concrete Mix ◽  
Water Based ◽  
Cement Additive ◽  
Compressive Strength Of Concrete ◽  
Shell Powder

This research uses paper ash, lokan shell powder, and sikacim concrete additivefor normal concrete mix. Paper ash is used as a cement additive, while lokan shell powder is used as a partial substitute for sand. To overcome the lack of water in the concrete mixture, Sikacim concrete additive is used. The purpose of this study was to determine the compressive strength of concrete resulting from the use of paper ash as an additive and lokan shell powder as a substitute for sand by adding sikacim concrete additive.The test object used a cube mold of 15 cm x 15 cm x 15 cm with a concrete compressive strength of K-250 design at the age of 28 days of testing. Variations of the specimens used paper ash 0.25% by weight of cement, and lokan shell powder 0%, 10%, 20%, 30% by weight of sand, and 0.7% additive from the volume of water. Based on the results of the compressive strength test of concrete, the compressive strength of concrete is obtained, for normal concrete it is 276.6 kg/cm2, from the use of 0.25% paper ash, 0% lokan shell and 0.7% additive of 362.6 kg/cm2, from the use of 0.25% paper ash, 10% lokan shell and 0.7% additive of 365.3 kg/cm2, from the use of 0.25% paper ash, 20% lokan shell and 0.7% additive of 300.53 kg /cm2, from the use of 0.25% paper ash, 30% lokan shell and 0.7% additive of 250.16 kg/cm2.

Study on Test Methods for Intelligence-Based Monitoring of Fresh Cement Concrete Quality

2013 ◽  
Vol 857 ◽  
pp. 3-9
Author(s):  
Zi Yi Hou ◽  
Peng Peng ◽  
Jin De Xie ◽  
Shao Peng Zheng ◽  
Ye Zhen Yuan
Keyword(s):  
Theoretical Basis ◽  
Cement Mortar ◽  
Test Methods ◽  
Current Data ◽  
Test Method ◽  
Cement Concrete ◽  
Intelligent Monitoring ◽  
Concrete Quality

A test method for monitoring of cement mortar quality has been devised and an empirical relational equation between cement mortar fluidity and torque has been worked out. A test method for monitoring of indoor fresh cement concrete quality has been devised and a relational equation between fresh cement concrete and torque has been worked out. A test method for monitoring of fresh cement concrete in a mixing plant has been devised and a relational equation between fresh cement concrete and current property has been worked out. By means of online observed torque and current data, relevant fluidity and slump can be predicted to provide test methods and relevant theoretical basis for intelligent monitoring of fresh cement mortar and cement concrete quality in actual engineering.

scholarly journals Effect of Various Curing on High Strength Concrete Using Slag Cement

2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Rahmi Karolina ◽  
◽  
M.A.P Handana ◽  
Rahmat Jatmikanto ◽  
◽  
...  
Keyword(s):  
Compressive Strength ◽  
Steel Production ◽  
Acid Water ◽  
Maximum Absorption ◽  
Type I ◽  
Cement Concrete ◽  
Slag Cement ◽  
High Quality ◽  
Normal Concrete ◽  
Water Curing

A The current environmental problem is regarding to CO2 gas emissions from cement production and the presence of hazardous material waste (B3) from steel production. One solution for that problem is by applying slag cement as a substitute for type I portland cement in concrete mix to create a high quality concrete that is environmentally friendly with a high durability and initial strength. This research aimed to compare a high quality concrete made from slag cement and a high quality concrete with conventional mixture. The slag cement used was obtained from PT. Indocement Indonesia. It is coupled with the use of Master Ease 3029 superplasticizer. The results showed that from the samples of concrete of 3, 7, 14, 28, 56 and 90 days of age, the maximum absorption value of normal concrete occurs at the age of 90 days with acid water curing of 1.57%. While the maximum absorption value of slag cement concrete occurs at the same age with acid water curing of 1.50%. The curing of normal concrete with water at 56 days of age has the largest compressive strength from all. It is also found that slag cement concrete has higher maximum compressive strength than that of normal concrete with acid water curing at 56 days of curing.

scholarly journals Comparison of Mechanical Properties of Normal and Fibre Reinforced Concrete (Grade M15)

2019 ◽  
Vol 5 ◽  
pp. 153-164
Author(s):  
Sagar Bista ◽  
Sagar Airee ◽  
Shikshya Dhital ◽  
Srijan Poudel ◽  
Sujan Neupane
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Steel Fibre ◽  
Residential Buildings ◽  
Fibre Reinforced Concrete ◽  
Cement Concrete ◽  
Normal Concrete ◽  
Steel Fibre Reinforced Concrete ◽  
Cracking Control ◽  
Different Types

Concrete is weak in tension, hence some measures must be adopted to overcome this deficiency as well as to enhance physical and other mechanical properties but in more convenient and economical method. Through many research from the past, it has been observed that addition of different types of fibres has been more effective for this purpose. This report presents the work undertaken to study the effect of steel and hay fibre on normal cement concrete of M-15 Grade on the basis of its mechanical properties which include compressive and tensile strength test and slump test as well. Although hay fibres are abundantly available in Nepal, no research have been popularly conducted here regarding the use of hay fibres in concrete and the changes brought by it on concrete’s mechanical properties. Experiments were conducted on concrete cubes and cylinders of standard sizes with addition of various percentages of steel and hay fibres i.e. 0.5%, 1% and 1.5% by weight of cement and results were compared with those of normal cement concrete of M-15 Grade. For each percentage of steel and hay fibre added in concrete, six cubes and six cylinders were tested for their respective mechanical properties at curing periods of 14 and 28 days. The results obtained show us that the optimum content of fibre to be added to M-15 grade of concrete is 0.5% steel fibre for compression and 0.5% hay fibre content for tension by weight of cement. Also, addition of steel and hay fibres enhanced the binding properties, micro cracking control and imparted ductility. In addition to this, two residential buildings were modeled in SAP software, one with normal concrete and other with concrete containing 0.5% steel fibre. Difference in reinforcement requirements in each building was computed from SAP analysis and it was found that 489.736 Kg of reinforcement could be substituted by 158.036 kg of steel fibres and decrease in materials cost of building with 0.5% steel fibre reinforced concrete was found to be Rs. 32,100.

scholarly journals Nanotechnological Advances in Catalytic Thin Films for Green Large-Area Surfaces

2015 ◽  
Vol 2015 ◽  
pp. 1-20 ◽  
Author(s):  
Suzan Biran Ay ◽  
Nihan Kosku Perkgoz
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Environmental Remediation ◽  
Transformational Change ◽  
Green Technology ◽  
Large Area ◽  
Thin Film Coatings ◽  
Technology Applications ◽  
Production Techniques ◽  
Save Energy

Large-area catalytic thin films offer great potential for green technology applications in order to save energy, combat pollution, and reduce global warming. These films, either embedded with nanoparticles, shaped with nanostructuring techniques, hybridized with other systems, or functionalized with bionanotechnological methods, can include many different surface properties including photocatalytic, antifouling, abrasion resistant and mechanically resistive, self-cleaning, antibacterial, hydrophobic, and oleophobic features. Thus, surface functionalization with such advanced structuring methods is of significance to increase the performance and wide usage of large-area thin film coatings specifically for environmental remediation. In this review, we focus on methods to increase the efficiency of catalytic reactions in thin film and hence improve the performance in relevant applications while eliminating high cost with the purpose of widespread usage. However, we also include the most recent hybrid architectures, which have potential to make a transformational change in surface applications as soon as high quality and large area production techniques are available. Hence, we present and discuss research studies regarding both organic and inorganic methods that are used to structure thin films that have potential for large-area and eco-friendly coatings.

Behaviors of Repaired Edge Column Slab Connections after Punching Failure Using Normal and Non-Shrinkable (CAH) Concrete

2016 ◽  
Vol 845 ◽  
pp. 166-174
Author(s):  
I. Ketut Sudarsana
Keyword(s):  
Flat Plate ◽  
Punching Shear ◽  
Normal Concrete ◽  
Plate Structures ◽  
Shear Damage ◽  
Concrete Mix ◽  
Surface Confinement ◽  
Strength And Stiffness ◽  
Original Strength ◽  
Punching Failure

Column slab connections in flat plate structures are critical part of the structure. Punching shear damage to the connections may occur during construction or post moderate earthquakes. To avoid demolishing overall structures with such damage, connections may be repaired to restore the original strength of the structures. This paper presents behavior of repaired edge column slab connections using normal concrete and non-shrinkable (CAH) concrete. Four edge connections of flat plate structure after failure were repaired using normal and non-shrinkable (CAH) concrete respectively for two connections. The connections were re-tested to fail under combined shear and moment. The results show that bonding agent Sika Top Armatec 110 Epocem gave an excellent bond between the old concrete and the repaired concrete in the tests of repaired edge column slab connection as there are no cracks observed along the concrete interface. The edge connections repaired using normal concrete can have similar strength and stiffness as the original connections when good curing is provided The edge connections repaired using an expansive CAH concrete exhibited less strength and stiffness compared to the original edge connections due to lack of surface confinement. The Superplasticizer used in CAH concrete (Mix. B) improves concrete expansion but reduce the strength of the repaired connections

scholarly journals The effect of zeolite addition on parameters of concrete containing recycled ceramic aggregate

2018 ◽  
Vol 45 ◽  
pp. 00116
Author(s):  
Jacek Szulej ◽  
Paweł Ogrodnik
Keyword(s):  
Compressive Strength ◽  
Material Properties ◽  
Frost Resistance ◽  
Environmentally Friendly ◽  
Concrete Material ◽  
Dominant Component ◽  
Concrete Mix ◽  
Aluminous Cement ◽  
Compressive Strength Of Concrete ◽  
Zeolite Tuff

In the paper it was decided to recognize the material characteristics of concrete based on ceramic aggregate, aluminous cement with the addition of zeolite (5%, 10%, 15%) and air entraining admixture. Aggregate crushed to 2 fractions was used for designing the concrete mix : 0-4 mm, and 4-8 mm. The research involved the use of clinoptilolite derived from the zeolite tuff deposit at Sokyrnytsya (Transcarpathia, Ukraine). The dominant component in the zeolite is clinoptilolite in an amount of about 75%. The research carried out by the authors showed that the addition of zeolite, among others, increases the compressive strength of concrete, significantly improves the frost resistance, which in the case of using only aluminous cement is very low. The obtained results confirm the possibility of using the above-mentioned components, which improve the concrete material properties and are environmentally friendly.

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