scholarly journals ANALISIS SAMBUNGAN BALOK PRECAST SEDERHANA SISTEM MECHANIC AND WET CONNECTION PADA MOMEN MAKSIMUM

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Andrias Rudi Hermawan ◽  
Eka Sasmita Mulya
Keyword(s):  
Compressive Strength ◽  
Maximum Load ◽  
Compressive Strength Of Concrete ◽  
Flexure Test

ABSTRACTThe Result of this research is conventional beam (K1,K2) or precast beam (P1,P2), for precast beam (P1,P2) grouted with SIKA Grout 215 product and mechanic at the joint. Compressive Strength of concrete at 28 day is 358,26 Kg/cm2For flexure test until failure have resulted for convensional beam K1 deflection at maximum load 9,61 ton is 2,114 cm, for convensional beam K1 deflection at maximum load 9,82 ton is 1,479 cm, for convensional beam K1 deflection at maximum load 12,79 ton is 2,103 cm, for convensional beam K1 deflection at maximum load 12,02 ton is 1,745 cmKeywords: Precast, Grouting, non shrinkageABSTRAKPada penelitian ini telah dihasilkan benda uji baik benda uji konvensional (K1, K2) maupun benda uji precast (P1,P2) dimana untuk benda uji P1 dan P2 dilakukan penggroutingan dengan bahan grouting nonshrinkage (tidak susut) produk Sika Grout 215 pada daerah sambungannya selain dengan mechanic joint. Mutu beton rata – rata yang dicapai adalah 358,26 Kg/cm2Hasil yang telah dicapai pada penelitian ini adalah untuk balok konvensional K1 menghasilkan lendutan pada beban maksimum 2,114 cm , untuk balok konvensional K2 menghasilkan lendutan pada beban maksimum 1,479 cm, untuk balok precast P1menghasilkan lendutan pada beban maksimum 2,103 cm, untuk balok precast P2 menghasilkan lendutan pada beban maksimum 1,745 cmBeban maksimum yang dicapai balok konvensional K1 adalah 9,61 ton, untuk balok konvensional K2, beban maksimum 9,82 ton, untuk balok precast P1, beban maksimum 12,79 ton, untuk balok precast P2 beban maksimum 12,02 tonKata Kunci : Precast, Grouting, non shrinkage

Variasi Penambahan Sika Cim Dan Fiber Kawat Pada Beton Mutu Fc’ 30 Mpa

2018 ◽  
Vol 9 (2) ◽  
pp. 67-73
Author(s):  
M Zainul Arifin
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Curing Temperature ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Normal Concrete ◽  
Astm Method ◽  
Additive Type ◽  
Composition Variation ◽  
Compressive Strength Of Concrete

This research was conducted to determine the value of the highest compressive strength from the ratio of normal concrete to normal concrete plus additive types of Sika Cim with a composition variation of 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1 , 50% and 1.75% of the weight of cement besides that in this study also aims to find the highest tensile strength from the ratio of normal concrete to normal concrete in the mixture of sika cim composition at the highest compressive strength above and after that added fiber wire with a size diameter of 1 mm in length 100 mm with a ratio of 1% of material weight. The concrete mix plan was calculated using the ASTM method, the matrial composition of the normal concrete mixture as follows, 314 kg / m3 cement, 789 kg / m3 sand, 1125 kg / m3 gravel and 189 liters / m3 of water at 10 cm slump, then normal concrete added variations of the composition of sika cim 0.25%, 0.50%, 0.75%, 1.00%, 1.25%, 1.5%, 1.75% by weight of cement and fiber, the tests carried out were compressive strength of concrete and tensile strength of concrete, normal maintenance is soaked in fresh water for 28 days at 30oC. From the test results it was found that the normal concrete compressive strength at the age of 28 days was fc1 30 Mpa, the variation in the addition of the sika cim additive type mineral was achieved in composition 0.75% of the cement weight of fc1 40.2 Mpa 30C. Besides that the tensile strength test results were 28 days old with the addition of 1% fiber wire mineral to the weight of the material at a curing temperature of 30oC of 7.5%.

Determination of Concrete Cube Strength from Used Samples / Určení Krychelné Pevnosti Betonu U Použitých Zkušebních Trámců

2012 ◽  
Vol 12 (2) ◽  
pp. 186-194 ◽  
Author(s):  
Oldřich Sucharda ◽  
David Mikolášek ◽  
Jiří Brožovský
Keyword(s):  
Compressive Strength ◽  
Concrete Beams ◽  
Linear Analysis ◽  
Bending Tests ◽  
Cube Strength ◽  
Non Linear ◽  
Compressive Strength Of Concrete ◽  
Concrete Cube

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.

scholarly journals Towards Sustainable Concrete Composites through Waste Valorisation of Plastic Food Trays as Low-Cost Fibrous Materials

2021 ◽  
Vol 13 (4) ◽  
pp. 2073 ◽  
Author(s):  
Hossein Mohammadhosseini ◽  
Rayed Alyousef ◽  
Mahmood Md. Tahir
Keyword(s):  
Compressive Strength ◽  
Low Cost ◽  
Impact Resistance ◽  
Food Tray ◽  
World Population ◽  
Fibrous Materials ◽  
Palm Oil Fuel Ash ◽  
Waste Plastic ◽  
Compressive Strength Of Concrete ◽  
The Impact

Recycling of waste plastics is an essential phase towards cleaner production and circular economy. Plastics in different forms, which are non-biodegradable polymers, have become an indispensable ingredient of human life. The rapid growth of the world population has led to increased demand for commodity plastics such as food packaging. Therefore, to avert environment pollution with plastic wastes, sufficient management to recycle this waste is vital. In this study, experimental investigations and statistical analysis were conducted to assess the feasibility of polypropylene type of waste plastic food tray (WPFT) as fibrous materials on the mechanical and impact resistance of concrete composites. The WPFT fibres with a length of 20 mm were used at dosages of 0–1% in two groups of concrete with 100% ordinary Portland cement (OPC) and 30% palm oil fuel ash (POFA) as partial cement replacement. The results revealed that WPFT fibres had an adverse effect on the workability and compressive strength of concrete mixes. Despite a slight reduction in compressive strength of concrete mixtures, tensile and flexural strengths significantly enhanced up to 25% with the addition of WPFT fibres. The impact resistance and energy absorption values of concrete specimens reinforced with 1% WPFT fibres were found to be about 7.5 times higher than those of plain concrete mix. The utilisation of waste plastic food trays in the production of concrete makes it low-cost and aids in decreasing waste discarding harms. The development of new construction materials using WPFT is significant to the environment and construction industry.

scholarly journals Effect of Palm Bunch Ash on the Compressive Strength of Concrete

2021 ◽  
Vol 1107 (1) ◽  
pp. 012171
Author(s):  
A. C. Ekeleme ◽  
E. I. Ugwu ◽  
C.E. Njoku ◽  
E.C. Amanamba ◽  
E. E. Arinze ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Compressive Strength Of Concrete ◽  
Palm Bunch

scholarly journals Effect of loss water during vibrations on the compressive strength of concrete fc’ 21.7 Mpa

2021 ◽  
Vol 1098 (6) ◽  
pp. 062013
Author(s):  
V L Roding ◽  
A I Candra ◽  
D A Karisma ◽  
T A Laksono ◽  
A Ansori ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Compressive Strength Of Concrete

scholarly journals Predicting Compressive Strength of Concrete Containing Recycled Aggregate Using Modified ANN with Different Optimization Algorithms

2021 ◽  
Vol 11 (2) ◽  
pp. 485
Author(s):  
Amirreza Kandiri ◽  
Farid Sartipi ◽  
Mahdi Kioumarsi
Keyword(s):  
Compressive Strength ◽  
Optimization Algorithms ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Tree Model ◽  
Grasshopper Optimization Algorithm ◽  
Compressive Strength Of Concrete ◽  
Grasshopper Optimization ◽  
Artificial Neural Network Ann ◽  
Industry Needs

Using recycled aggregate in concrete is one of the best ways to reduce construction pollution and prevent the exploitation of natural resources to provide the needed aggregate. However, recycled aggregates affect the mechanical properties of concrete, but the existing information on the subject is less than what the industry needs. Compressive strength, on the other hand, is the most important mechanical property of concrete. Therefore, having predictive models to provide the required information can be helpful to convince the industry to increase the use of recycled aggregate in concrete. In this research, three different optimization algorithms including genetic algorithm (GA), salp swarm algorithm (SSA), and grasshopper optimization algorithm (GOA) are employed to be hybridized with artificial neural network (ANN) separately to predict the compressive strength of concrete containing recycled aggregate, and a M5P tree model is used to test the efficiency of the ANNs. The results of this study show the superior efficiency of the modified ANN with SSA when compared to other models. However, the statistical indicators of the hybrid ANNs with SSA, GA, and GOA are so close to each other.

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