scholarly journals KUAT TEKAN DAN TARIK BETON DAUR ULANG YANG DIBUAT DARI BONGKARAN BETON PERKERASAN KAKU JALAN SEBAGAI AGREGAT KASAR: STUDI EKSPERIMENTAL

2021 ◽  
Vol 9 (1) ◽  
pp. 50-58
Author(s):  
Suharwanto
Keyword(s):  
Water Absorption ◽  
Concrete Slab ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Recycled Aggregate ◽  
Fine Aggregate ◽  
Rigid Pavement ◽  
Slump Test ◽  
Material Development ◽  
Natural Aggregate

ABSTRAKBeton daur ulang merupakan campuran dari agregat kasar atau agregat halus daur ulang. Salah satunya dibuat dari hasil bongkaran pelat beton perkesaran kaku jalan (rigid pavement). Pembongkaran ini disebabkan oleh kerusakan, keretakan dan keausan pada perkerasan kaku yang diakibatkan oleh beban kendaraan. Bongkaran beton tersebut seringkali dibuang di sembarangan tempat atau hanya  menjadi bahan urugan saja. Hal ini  tidak menguntungkan, sehingga pada penelitian ini, bongkaran perkerasan kaku tersebut dijadikan sebagai agregat daur ulang. Pemanfaatan bongkaran beton ini merupakan perkembangan material beton, namun belum umum digunakan untuk material perkerasan kaku. Oleh karena itu, penelitian ini memanfaatkan bongkaran beton tersebut sebagai bahan baku beton dan diuji secara eksperimental untuk mendapatkan sifat fisik dan mekanik beton daur ulang. Hasil pengujian laboratorium menunjukkan bahwa persentase kadar air dan berat jenis agregat daur ulang lebih kecil dari agregat alam atau batu pecah, namun persentase abrasi dan penyerapan air atau porositas lebih besar dari pada agregat alam. Selanjutnya, agregat daur ulang tersebut digunakan sebagai pengganti agregat kasar alam dengan variasi 0, 25, 50, 75 dan 100%, dan kuat tekan rencana beton 20, 25 dan 30 Mpa. Hasil uji slump sebagai salah satu jenis uji beton segar mengalami penurunan, karena adanya peningkatkan kandungan agregat daur ulang, yaitu 2,17 – 15,74 %. Begitu juga penurunan hasil uji berat volume yaitu 0.88 – 9,28%, nilai kuat tekan beton adalah 3.7 -  25,7%  dan tarik beton adalah 21,90 – 65,22%. Hal ini diakibatkan oleh peningkatan nilai persentase abrasi dan penyerapan air pada agregat daur ulang.     ABSTRACTRecycled concrete is a mixture from recycled coarse or fine aggregate. One of them is made from demolished of road rigid pavement of concrete slab. It is coused by to damage, cracks and abrasion on the rigid pavement that is caused by vehicle loaded. The concrete demolished is often dumped in the  any places or becomes fill material only. It has not benefited, so in this research, demolished of rigid pavement is made as a recycled aggregate. Utilization of this demolished concrete is a concrete material development, but it is not used commonly for rigid pavement material yet. Therefore, this research was use concrete demolished as raw material of concrete and it is tested experimentally to obtain the physical and mechanical properties of recycle concrete. Laboratory test result of water content percentage and specific gravity of recycled aggregate are smaller than natural aggregate or crush rock, but abrasion and water absorption or porosity percentage are greater than natural aggregate. Furthermore, the recycled aggregate is used as a substitute for natural coarse aggregate which variations of 0, 25, 50, 75 and 100%, and concrete compressive strength design is 20, 25 and 30 MPa. Result of the slump test as false The slump test as a kind of fresh concrete test does decrease when increasing the recycled aggregate content, that is 2 -16,%.. Likewise, decreasing of concrete weight volume is 0.88 – 9,28%,  concrete compressive test results us  3.7 -  25,7% and concrete tensile strength is 21,90 – 65,22%. Those are caused by increasing abrasion and water absorption percentage of recycled aggregate.

Study on Performance of Recycled Aggregate Concrete

2011 ◽  
Vol 477 ◽  
pp. 280-289 ◽  
Author(s):  
Shao Wei Yao ◽  
Zhen Guo Gao ◽  
Chang Rui Wang
Keyword(s):  
Mechanical Properties ◽  
Coarse Aggregate ◽  
Physical And Mechanical Properties ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Chemical Solution ◽  
Aggregate Concrete ◽  
Recycled Coarse Aggregate ◽  
Natural Aggregate ◽  
Strength And Durability

The properties of recycled coarse aggregate and the slump, the physical and mechanical properties and durability of recycled aggregate concrete were studied through tests. The results indicate that the slump, compressive strength and durability of concrete with recycled aggregate are lower than that of concrete with natural aggregate when recycled coarse aggregate fully absorbs water. However, the slump can be similar to that of concrete with natural aggregate. The properties of recycled aggregate concrete can be improved by strengthening the recycled coarse aggregate, and it is also found that the recycled coarse aggregate strengthened by grinding is superior to that soaked by chemical solution.

scholarly journals Possibility to use waste tire waste in the composition of mixtures for the manufacture of cement blocks

2020 ◽  
Vol 9 (9) ◽  
pp. e69996773
Author(s):  
Maria Gabriela Araujo Ranieri ◽  
Maria Auxiliadora de Barros Martins ◽  
Patrícia Capellato ◽  
Mirian de Lourdes Noronha Motta Melo ◽  
Adilson da Silva Mello
Keyword(s):  
Water Absorption ◽  
Maximum Stress ◽  
Physical And Mechanical Properties ◽  
Laboratory Research ◽  
Structural Function ◽  
Mechanical Resistance ◽  
Fine Aggregate ◽  
Natural Sand ◽  
Waste Tires ◽  
Made In

The modern lifestyle has led to an increase in the amount of solid waste in the world, and waste tires are one of the most generated. Annually billions of tons of waste tires are produced, so in this study, we sought to reuse them to make materials for civil construction. For this, a laboratory research was carried out where samples were made in 50 x 100 mm cylinders with traces of 0, 10, 15 and 20% (by weight) of waste, in addition to cement, natural sand and water. The granulometric distribution of waste tires and sand was also carried out. And, with the samples in cylinders, the physical and mechanical properties were evaluated, such as water absorption and apparent density, in addition to the analysis of the mechanical resistance to compression and the modulus of elasticity. The results showed that the granulometric distribution of the tire residue fits as a fine aggregate, similar to the sand granulometry. The water absorption rate of the waste specimens was less than 10%. However, the mechanical resistance decreases proportionally as the amount of tire waste has increased. However, when analyzing the behavior of the stress x strain curves, the specimens containing residues, became more flexible, as they are capable of supporting loads beyond the maximum stress. In this way, the resistance and the ability to absorb energy were increased. We concluded that it is possible to incorporate certain quantities of waste tires in blocks for civil construction, but without a structural function.

scholarly journals Flexural Behaviour of RC Beams with Recycled Aggregates

2019 ◽  
Vol 8 (6S3) ◽  
pp. 1522-1525
Keyword(s):  
Coarse Aggregate ◽  
Raw Material ◽  
Recycled Aggregate ◽  
Recycled Aggregates ◽  
Project Work ◽  
Fine Aggregate ◽  
Fine Aggregates ◽  
Glass Aggregate ◽  
Efficient Alternative ◽  
Cost Efficient

-Continuous raw material demand was increased in concrete productions which requires good quality and cost efficient alternative materials like Recycled Coarse Aggregate, M Sand and Glass as aggregate. This paper reports the behaviour of concrete using Glass aggregate as Fine Aggregate and Recycled aggregate as Coarse Aggregate replacement in concrete up to 15% and 30% respectively. In this project work, the concrete grade M25 was selected and IS method was used for mix design. The properties of Cement, M-Sand, Natural Coarse Aggregate, Glass asAggregate and Recycled Aggregate were investigated. The Beam Specimens were casted with and without C&D waste (Coarse Aggregate Replaced with Recycled Aggregate at 30% and Fine Aggregates replaced with Glass Aggregate at 15%). Vibration Analysis were made by using FFT analyser to determine acceleration characteristics. The work is focused on possible conservation of natural resources by substituting with waste material by suggesting a possible reuse option for Construction waste.

scholarly journals Ceramics based on concrete wastes prepared by spark plasma sintering

2021 ◽  
Vol 15 (1) ◽  
pp. 100-109
Author(s):  
Mohammed Abass ◽  
Yasuyuki Kanda
Keyword(s):  
Flexural Strength ◽  
Spark Plasma Sintering ◽  
Liquid Phase Sintering ◽  
Recycled Concrete ◽  
Raw Material ◽  
Recycled Aggregate ◽  
Fine Aggregate ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sand Particles

An effective utilization technique is required to recycle fine aggregate in concrete waste because the presence of residual waste cement reduces the quality of the recycled concrete. In this study, recycled aggregate powder (RAP) was prepared by milling Okinawan concrete waste and developing a ceramic compact with high flexural strength using the spark plasma sintering (SPS) method. The RAP raw material consisted mainly of calcite and quartz. The densification gradient of the sintered compact was uniform during sintering at 1123-1273K. At 1273K sintering temperature, Vickers hardness (HV) obtained a maximum of 393 along with 78.9MPa maximum flexural strength, which exceeded the porcelain stoneware tile ISO 13006 standards. Scanning electron microscopy with energy dispersive X-ray (SEM-EDX) element analysis suggested that the inner structure constituted unmelted silica-rich sand particles and melted calcium-rich particles containing waste cement and fine aggregate with limestone. Therefore, it can be concluded that SPS progressed by the liquid-phase sintering phenomenon between sand particles and calcium-rich particles, which contributed to flexural strength and modulus improvement.

scholarly journals INFLUENCE OF PEAT WATER ON MECHANICAL PROPERTIES OF COCONUT SHELL AND FLY ASH BASED CONCRETE

2019 ◽  
Vol 7 (2) ◽  
pp. 102-108
Author(s):  
Yulin Patrisia ◽  
Topan Eka Putra
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Water Absorption ◽  
Raw Material ◽  
Coconut Shell ◽  
Partial Replacement ◽  
Plain Water ◽  
Fine Aggregate ◽  
Coconut Shells

This study aimed to determine the influence of peat water on the mechanical properties of the paving block (compressive strength and water absorption) using coconut shell waste and fly ash as raw material. The background of the research were the lack utilization of fly ash, preparation for the handling and utilization of fly ash from power station at Pulang Pisau and Tumbang Kajuei (under construction), and the utilization of coconut shell to be more effective and economical. Paving block specimens were immersed in peat water to determine the effect of peat water and the rest were immersed in plain water. This experiment used fly ash as a partial replacement of cement and 2% coconut shell as a partial replacement of fine aggregate. The results of the analysis showed that: (a) Paving block using fly ash and coconut shells which were immersed in plain water experienced the increase in compressive strength and the decrease in water; (b) Paving block using fly ash and coconut shells soaked in peat water showed that by the increase of age, compressive strength was decrease and water absorption was increase; (c) The compressive strength of paving block specimens immersed in plain water and peat water showed relatively similar values at 7 and 28 days age, (d). Water absorption in paving block specimens soaked both in plain water and peat water showed relatively similar values at 7 days age, but at 28 days age the specimens immersed in peat water had greater water absorption.

Comparison of Dolomite Clay and Cullet Addition on Physical and Mechanical Properties of Clay Bricks

2018 ◽  
Vol 766 ◽  
pp. 241-245
Author(s):  
Rattaphon Kantajan ◽  
Soravich Mulinta
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Raw Materials ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Component Ratio ◽  
Clay Brick ◽  
Red Clay ◽  
X Ray ◽  
Clay Bricks

The purpose of this study was to study and characterize the properties of physical – mechanical for clay bricks. The raw materials used in the study are from local sources. They are Sri Khum red clay, dolomite and cullet. The component ratio of clay brick as an addition Sri Khum red clay 50–90 %, foaming agent (dolomite and cullet) 10–50%. The characterization of raw material was analyzed by particle analyzer, X-ray fluorescence (XRF) and X-ray diffraction (XRD). The shrinkage, water absorption and compressive strength of clay brick were tested. The results showed that the properties of clay bricks after firing at temperature at 900°C were studied. The Sri Khum red clay 80% and cullet 20% had a shrinkage of 6.95%, water absorption of 20.4% and compressive strength of 182 kg/cm2. The physical – mechanical of clay brick achieved the requirements of Thai industrial standard (TIS 77-2545).

scholarly journals SOME CHARACTERISTICS OF BUILDING MATERIALS OF ANCIENT KYYIVAN MONUMENTS OF THE X-TH - THE XIІ-TH CENTURIES

2020 ◽  
pp. 260-271
Author(s):  
Natalia Logvyn
Keyword(s):  
Water Absorption ◽  
Building Materials ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
High Porosity ◽  
Light Yellow ◽  
Lime Kilns ◽  
Ancient Monuments ◽  
High Level

The development of brickwork technique in ancient Kyyiv dates back to the X- th century. Old Rus` monuments’ masonry was made of large thin bricks called “plynfa” and lime-and-ceramic mortar. The size of the X-th – the XII-th brick sides varies from 27 to 36 cm, its thickness – from 2.5 to 4.5 cm. Different kinds of clay and loess extracted from the territory of Kyyiv and its vicinities were used as a raw material for brick and ceramic addition to mortar. That is why bricks in Kyyivan monuments differ in colour from light yellow to orange and dark red. Some gruss or cut straw were used as addition to fat clay. Limestone was brought to Kyyiv from Chernihiv area and lime mortar was produced in lime kilns situated near building sites. Ceramic addition to mortar called “tsemianka” was of refined clay, and crushed brick waste was used as well. Bricks were burnt under the temperature of 1000 – 1200 degrees C. That’s why bricks were very firm regardless of chink-like pores appeared as a result of hand-moulding of brick. The author took some investigation for the purpose to determine physical and mechanical properties of ancient bricks of Kyyivan monuments. Bricks were picked out of excavations or waste after building repairs. Small cubes were cut out of bricks with the height equal to brick thickness. Those samples were examined concerning their strength by compressing them perpendicularly to the sides the bricks were bedded in mortar. The strength of samples varied from 100 to 200-300 kg per sq.cm, water absorption was 10 % to 20 %. Some bricks taken from the Cathedral of the Assumption of Kyyiv-Pechersk  monastery were the most firm. The strength of those samples was about 400-500 kg per sq. cm, their water absorption was the smallest, about 5.6 %. Because of high porosity and water absorption of building materials the surface of ancient masonry was exposed to destruction under the influence of temperature overfalls and precipitation, as it can be seen on the open parts  of walls of the Old Rus` monuments. To prevent destruction of masonry, the walls of ancient monuments were covered with fine lime-and-ceramic mortar. Fragments of original plaster can be found on the walls of the XI-th century monuments St.Sophia Cathedral and St.Michael Church of Vydubychy monastery in Kyyiv. High level of well-developed building technique and high quality of building materials caused durability of ancient masonry and constructions in Kyyivan monuments, which preserved until nowadays.

scholarly journals Effect of Recycled Aggregate Quality on the Bond Behavior and Shear Strength of RC Members

2018 ◽  
Vol 8 (11) ◽  
pp. 2054 ◽  
Author(s):  
Thanapol Yanweerasak ◽  
Theang Kea ◽  
Hiroki Ishibashi ◽  
Mitsuyoshi Akiyama
Keyword(s):  
Mechanical Properties ◽  
Fine Particles ◽  
Cement Mortar ◽  
Physical And Mechanical Properties ◽  
Recycled Aggregate Concrete ◽  
Recycled Aggregate ◽  
Rc Structures ◽  
Natural Aggregate ◽  
Small Cracks ◽  
Industrial Standards

During the aggregate crushing process, natural aggregate and clinging mortar from existing concrete will inevitably produce small cracks and weak bonds between the aggregate and the existing cement mortar. The weaknesses of the existing cement mortar, adhered to a natural aggregate, negatively affect the properties of a recycled aggregate concrete, which prevents its application in reinforced concrete (RC) structures. Recycled aggregate can be classified into several categories, according to its physical and mechanical properties. The properties of concrete incorporated with the recycled aggregate of various qualities can be controlled, and the variability in its strength can also be reduced. This study aims to promote the application of recycled aggregate by investigating the effects of recycled aggregate quality (i.e., water absorption and the number of fine particles) classified by the Japanese Industrial Standards (JIS) on material properties, mechanical properties, and shear behavior of RC beams with recycled aggregate.

Study of the use of kaolin waste as a partial substitute for fine aggregate in the production of concrete for pavers

2021 ◽  
Vol 2 (2) ◽  
pp. 2474-2489
Author(s):  
Thyago Lima Souza ◽  
Adriano Lopes Gualberto Filho ◽  
Deividy Kaik de Lima Araujo ◽  
Marcos André Lira Silva ◽  
Marco Antônio Assis De Oliveira ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Water Absorption ◽  
Construction Industry ◽  
Strength Test ◽  
Raw Material ◽  
Fine Aggregate ◽  
Tensile Strength Test ◽  
Flexural Tensile Strength ◽  
Simple Compression

The study of the use of kaolin waste has scientific and socio-environmental value by providing an appropriate destination, reducing the demand and consequent problems arising from its extraction, considering that the construction industry is a consumer of a significant amount of raw material. Thus, the study aims to replace the fine aggregate by kaolin waste in the proportions of 10%, 20% and 30%, verifying its feasibility for interlocking sidewalk pieces. The kaolin waste was used with and without fine material, and physical characterization tests of the materials were performed, and then the concrete pieces were subjected to tests of resistance to simple compression, water absorption and resistance to abrasion, as prescribed by ABNT NBR 9781:2013, and flexural tensile strength test, according to ABNT NBR 12142:2010. According to the results and analyzing the compressive strength at 28 days, the mixtures with replacement of 10% of fine aggregate by kaolin waste reached strengths greater than 35 MPa, an acceptable normative parameter, both for the waste with fines and without fines, making its use feasible.

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