The Influence of Compression Applied during Production to the Compression Strength of Dry Concrete: An Experimental Study

Sulistyana,; Purwanto, Purwanto; Widoanindyawati, Vemi; Pratama, M. Mirza Abdillah

doi:10.1016/j.proeng.2014.12.206

Cited by 13 publications

(5 citation statements)

References 5 publications

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“…SULISTYANA et al [20] avaliaram 9 graus distintos de compactação na obtenção de concretos secos. Identificaram uma relação direta entre a intensidade de compactação e a resistência do material, de tal forma que, quanto maior a pressão aplicada, maior a resistência obtida.…”

Section: Particularidades Do Concreto Secounclassified

Influência do tipo de agregado na resistência e deformabilidade de blocos estruturais produzidos com concreto seco: estudo numérico, experimental e estatístico

et al. 2022

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RESUMO O comportamento da alvenaria estrutural resulta do desempenho de cada componente: unidades, juntas de argamassa, grautes e armaduras. Comercialmente, os blocos para alvenaria são produzidos com concreto seco ou zero-slump. Sua dosagem e propriedades físicas se diferem consideravelmente dos concretos convencionais e dependem da eficiência de compactação das máquinas vibroprensas. Ensaiar elementos de alvenaria em tamanho natural é dispendioso e requer uma infraestrutura específica. Nessa perspectiva, modelagens computacionais baseadas em formulações numéricas como o Método dos Elementos Finitos (FEM) podem se tornar alternativas viáveis e de grande potencial. Este trabalho objetiva analisar numérica e experimentalmente a influência do tipo de agregado nas propriedades físicas e, sobretudo, mecânicas (módulo secante e resistência à compressão) de blocos vazados de concreto para alvenaria estrutural. Foram testadas três resistências de bloco (6, 12 e 24 MPa), contendo três tipos de agregado (basalto, gnaisse e calcário). Dos resultados, observou-se que em blocos menos resistentes a porosidade das misturas influenciou mais as propriedades mecânicas que a rigidez do agregado. À medida que os concretos se tornam mais densos e resistentes, esse comportamento muda. Os modelos implementados e calibrados pelos resultados experimentais reproduziram satisfatoriamente o modo de ruptura dos blocos, os resultados de módulo e de resistência.

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Section: Particularidades Do Concreto Secounclassified

Influência do tipo de agregado na resistência e deformabilidade de blocos estruturais produzidos com concreto seco: estudo numérico, experimental e estatístico

et al. 2022

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“…The maximum compressive strength test results are around 70 Mpa or two times greater than the pressure without vibration when making test specimens. The following is a reverse study conducted by Arslan, ME (2011) with a mixture of high-quality concrete designs, using several types of b / c ratios between 0.3 to 0.6 and a time vibrating of 0 to 240 seconds without pressing, it found that compressive strength the maximum occurs between 65 seconds with an aw / c ratio of 0.3 [3]. The two studies above cannot be applied to the CPB manufacturing process except for low w/c, because the CPB manufacturing process demanded with fast processing and high compressive strength.…”

Section: Introductionmentioning

confidence: 98%

The Effect of Vibration Energy Changes on Compressive Strength of Concrete Paving Block (CPB) in Concreting Process with Vibropressing System

Widayanto¹,

Soehardjono²,

Wisnumurti³

et al. 2019

Proceedings of the 2019 1st International Conference on Engineering and Management in Industrial System (ICOEMIS 2019)

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The Concrete which has low w/c, or Concrete Paving Block (CPB) requires technology in the compaction process. Compaction with vibropressing technology is a compaction technology that combines vibrations and presses that carried out simultaneously. The objection of the research is finding the effect of vibration energy changes on CPB compressive strength characteristics. The research method accordance with the ACI method used the volume proportioning of the mixture are 1 cement: 4 fine aggregate: 4 coarse aggregate with w/c ratio 0.6 and the target compressive strength of the average CPB 18.3 N / mm2. Coarse aggregates take from processing rock breakers with a grain size of 0-5 mm. The samples were tested using a treatment method using a regulator with parameters as a measure to observe the CPB compressive strength characteristics. The settings in question are frequency, vibration time, and pressure during production. This study was conducted repeatedly using a 4 HP electric motor for the first and using a 7HP electric motor. The results showed differences that occurred, starting from recording data on vibration acceleration fluctuations when installing 4HP and 7HP. The higher the vibration energy, the higher the number of vibrations, and the higher the compressive strength produced.

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“…Layered concrete has many advantages, such as: saving construction time; saving overall cost; reducing cement consumption; having a high strength to overall weight ratio; and having good impact; thermal, and durability properties [17][18][19][20][21]. Utilizing alternative binders to replace cement in graded concrete with using lightweight concrete to reduce the overall weight can preserve the cement consumption and reduce the construction cost up to 50% [22][23][24][25][26]. Using normal strength concrete for satisfying required ductility in the compression zone and lightweight concrete for reducing overall weight in the tensile zone of the layered element shows good results, and no bond problems between concrete layers have been investigated [27].…”

Section: Introductionmentioning

confidence: 99%

Structural behavior of Lightweight and High strength Layered Hollow Core Slabs

Ghamry

Esia

Aboul-Nour

2022

Frattura Ed Integrità Strutturale

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A new technique of Layered Hollow Core Slab (LHCS) has been used to obtain a slab with an optimum weight-to-strength ratio. Specimens with a 90 mm top layer of High Strength Concrete (HSC) and a 90 mm bottom layer of Lightweight Aggregate Concrete (LWAC) were examined. Nine full-scale slabs with dimensions of 1600* 450* 180 mm were tested under a 4-point loading test. The %core, a/d, RFT ratio, and connection method were the different studied parameters. A push-out test was conducted on triplet specimens to study the bond strength at the interface between HSC jacket and LWAC cubes using bond agent material or shear dowels, or without treatment, to determine which method of them is suitable for connecting the two layers of the tested slabs. Load, deflection, ductility, strain, crack pattern, and mode of failure were studied. The results indicate that ultimate strength is enhanced with decreasing a/d and %core and with an increasing RFT ratio of the LHCS specimens. Using shear dowels ensures an efficient bond between the two layers of the tested slabs. ANSYS program used for modelling the slab. The numerical study accepted the experimental data with a variation of less than 10% for all slabs.

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The Influence of Compression Applied during Production to the Compression Strength of Dry Concrete: An Experimental Study

Cited by 13 publications

References 5 publications

Influência do tipo de agregado na resistência e deformabilidade de blocos estruturais produzidos com concreto seco: estudo numérico, experimental e estatístico

Influência do tipo de agregado na resistência e deformabilidade de blocos estruturais produzidos com concreto seco: estudo numérico, experimental e estatístico

The Effect of Vibration Energy Changes on Compressive Strength of Concrete Paving Block (CPB) in Concreting Process with Vibropressing System

Structural behavior of Lightweight and High strength Layered Hollow Core Slabs

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