scholarly journals Strength optimization of reactive powder concrete

2020 ◽  
Vol 13 (5) ◽  
Author(s):  
Abrahão Bernardo Rohden ◽  
Ana Paula Kirchheim ◽  
Denise Dal Molin
Keyword(s):  
Compressive Strength ◽  
Aggregate Size ◽  
Reactive Powder Concrete ◽  
Maximum Aggregate Size ◽  
Second Phase ◽  
Fine Aggregate ◽  
Inorganic Pigments ◽  
Concrete Mix Design ◽  
Fine Quartz ◽  
Reactive Powder

abstract: Recent reports on reactive powder concrete address important aspects regarding its performance. Several techniques are used to improve the design of such concretes. Ultra-high compressive strengths have been reported with the application of pre-setting pressure and autoclave curing. The objective of this work is to evaluate the use of very fine quartz powder to replace fine aggregate, nanosilica, and inorganic pigments to optimize mechanical properties of reactive powder concrete. The experimental work was developed in three distinct phases. In the first phase, mix-proportions of reactive powder concrete have been developed, considering different maximum aggregate sizes (1.2, 0.6, 0.075, and 0.045 mm). In the second phase, the influence of nanosilica on the properties of reactive powder concrete was evaluated. In the third phase, the effect of the addition of yellow, green, orange, and blue inorganic pigments to the reactive powder concrete mix-design was evaluated. Results show that the maximum aggregate size influences the compressive strength of the reactive powder concrete. A decrease from 1.2 mm to 0.045 mm in the maximum aggregate size resulted in 156 MPa increase in the compressive strength. The type of pigment did not significantly influence the compressive strength of the reactive powder concrete. The mix-proportion that resulted in the highest compressive strength (310.7 MPa) was designed using yellow pigment.

scholarly journals PENGARUH UKURAN BUTIRAN MAKSIMUM TERHADAP KUAT TEKAN REACTIVE POWDER CONCRETE

2019 ◽  
Vol 3 (1) ◽  
pp. 161
Author(s):  
Arianti Sutandi ◽  
Widodo Kushartomo
Keyword(s):  
Compressive Strength ◽  
Aggregate Size ◽  
Maximum Size ◽  
Dominant Factor ◽  
Maximum Diameter ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Steam Curing ◽  
Aggregate Gradation ◽  
Reactive Powder

Kuat tekan beton merupakan faktor yang paling dominan untuk menentukan kualitas beton dibandingkan faktor lainnya. Kuat tekan beton atau mutu beton dipengaruhi oleh beberapa faktor diantaranya adalah perbandingan semen terhadap air (fa/s), kualitas material, perbandingan komposisi material dan sebagainya. Gradasi butiran agregat  juga merupakan salah satu faktor yang berperan penting untuk menentukan mutu beton. Agregat dengan ukuran butiran yang lebih halus dan bervariasi dapat memperkecil volume pori yang terbentuk, sehingga susunan butiran yang baik akan menghasilkan kepadatan tinggi dan porositas minimum. Pada penelitian ini dipelajarai pengaruh ukuran butiran maksimum agregat halus terhadap  kuat tekan reactive powder concrete. Benda uji dibuat dalam bentuk silinder dengan diameter 100,0 mm dan tinggi 200,0 mm. Ukuran diameter maksimum agergat halus dibuat dalam tiga jenis yaitu 300 µm. 425 µm, dan 600 µm. Seluruh benda uji dirawat dengan teknik perendaman selama 3 hari, dilanjutkan dengan steam curing pada temperature 90 oC – 95 oC selama 4 jam. Pengujian kuat tekan dilakukan pada umur 7 hari. Hasil pengujian menunjukkan terjadinya peningkatan kuat tekan recative powder concrete dengan bertambah kecilnya ukuran butiran maksimum agregat halus. The compressive strength of concrete is the most dominant factor to determine concrete quality compared to other factors. Concrete compressive strength and grade are influenced by several factors, including water cement ratio (fa/s), material quality, material composition, and others. Aggregate gradation is also one of the dominant factors that play an important role in determining the quality of concrete. Finer and varied aggregate size can reduce void volume, so that a good granular structure will produce high density and minimum porosity. In this research, the effect of maximum size of fine aggregate on the compressive strength of reactive powder concrete was studied. The specimens were made in cylindrical shapes with a diameter of 100.0 mm and a height of 200.0 mm. The maximum diameter size of fine agergate was varied in three types, 300 µm. 425 µm, and 600 µm. All specimens were treated with immersion technique for 3 days, followed by steam curing at 90 oC - 95 oC for 4 hours. Compressive strength testing was done at the age of 7 days. The test results showed that the increase of maximum fine aggregate size increase the compressive strength of reactive powder concrete.

Effect of maximum grain size on value of modulus of rupture reactive powder concrete

2020 ◽  
Vol 26 (1) ◽  
pp. 1-8
Author(s):  
Widodo Kushartomo ◽  
Dewi Linggasari ◽  
Arianti Sutandi
Keyword(s):  
Concrete Beam ◽  
Aggregate Size ◽  
Modulus Of Rupture ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Steam Curing ◽  
Cement Ratio ◽  
Water Cement Ratio ◽  
Buckling Failure ◽  
Reactive Powder

Modulus of rupture (R) is a measurement of a tensile strengh of a concrete beam. The value of R is affected by the size of fine aggregat grain, the density of the concrete beam and the water-cement ratio. The unit of R is MPa expressing the tensile strength of the concrete beam without reinforcement to withstand a buckling failure. The distance between the supports of the concrete beam should not be less than three times of the height of the beam. In this research the size of the concrete beam speciment was 100 mm x 100 mm x 350 mm, the maximum fine aggregate size was varied (300 µm, 425 µm, and 600 µm) and the water-cement ratio was also varied (0.25, 0.22 and 0,20). All speciments were cured by steam curing and were tested after seven days. The results show that the larger the size of the fine aggregat grain and the higher the water-cement ratio, the smaller the R.

Study on Low-Cost Reactive Powder Concrete and its Application

2009 ◽  
Vol 405-406 ◽  
pp. 62-68
Author(s):  
Ming Zhang ◽  
Feng Xing ◽  
Liang Peng Deng ◽  
Zheng Liang Cao ◽  
Zhan Huang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Quartz Sand ◽  
Large Scale ◽  
Low Cost ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Complex Procedure ◽  
Reactive Powder ◽  
Very High

Reactive powder concrete (RPC) is a new kind of material with very high mechanical behavior and durability, however, high cost and complex procedure to make RPC result in hardly apply to engineering in large scale. a new low-cost RPC that compressive strength exceeds 130MPa was prepared with the replacement of quartz sand, crushed quartz and partial of silica fume by fly ash, slag and natural fine aggregate in the paper. Manhole cover that made from the low-cost RPC can meets the requirements of different situations, such as special road, motorway, etc.

Compressive Strength Performance of Reactive Powder Concrete Using Different Types of Materials as a Partial Replacement of Fine Aggregate

2020 ◽  
Vol 857 ◽  
pp. 39-47
Author(s):  
Shatha D. Mohammed ◽  
Hadeel K. Awad ◽  
Rawaa K. Aboud
Keyword(s):  
Compressive Strength ◽  
Activated Carbon ◽  
Granular Activated Carbon ◽  
Partial Replacement ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Concrete Technology ◽  
Glass Waste ◽  
Strength Performance ◽  
Reactive Powder

Reactive Powder Concrete (RPC) can be incorporate as a one of the most important and progressive concrete technology. It is a special type of ultra-high strength concrete (UHSC) that’s exclude the coarse aggregate from its constitutive materials. In this research an experimental study had been carried out to investigate the effect of using three types of materials (porcelain aggregate) and others sustainable materials (glass waste and granular activated carbon) as a partial replacement of fine aggregate. Four percentages had considered (0, 10, 15 and 20) % to achieve better understanding for the influence of these materials upon the compressive strength of RPC. Four curing ages had included in this study, these are; 7, 28, 60 and 90 days. The outcomes of the experimental works improved that using porcelain aggregate as a partial replacement had an advanced effect on the compressive strength for all the adopted percentages and for all the studied curing ages. The maximum modification that’s obtained in case of porcelain aggregate was (24.14) % at age (90) days for 20% replacement. Using glass waste caused an increase in the overall values of the compressive strength for all the adopted replacements with less efficient than porcelain to reached (20.69) % at age (90) days for 20% replacement. Regarding the granular activated carbon, only (10%) replacement had a positive influence on the compressive strength to reached (13.16) % while the others caused a reduction in the compressive strength reached to (29.13)% for 20% replacement.

scholarly journals Studi Mengenai Perancangan Campuran Beton Abu Terbang dengan Pendekatan Blended Sand (Hal. 88-97)

2018 ◽  
Vol 4 (4) ◽  
pp. 88
Author(s):  
Reza Fauzi Nirwan ◽  
Priyanto Saelan
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Aggregate Size ◽  
Maximum Aggregate Size ◽  
Fine Aggregate ◽  
Concrete Compressive Strength ◽  
Fly Ash Concrete ◽  
Is Research ◽  
Strength Tests ◽  
Concrete Mix

ABSTRAKPenelitian ini dilakukan untuk mengetahui hasil perancangan campuran beton abu terbang yang mensubtitusi semen dengan cara pendekatan sand blended, yaitu abu terbang yang mensubtitusi semen diperlakukan sebagai agregat halus, sehingga agregat halus merupakan campuran dari pasir dan abu terbang. Penelitian dilakukan dengan kuat tekan rencana 20 MPa dan 30 MPa. Substitusi semen oleh abu terbang sebesar  10 %, 20 %, dan 30 % dari berat semen. Ukuran maksimum agregat kasar yang digunakan adalah 20 mm, dan pasir dengan modulus kehalusan 2,768, slump rencana 6 cm dan 10 cm. Hasil pengujian tekan silinder beton berdiameter 10 cm dan tinggi 20 cm menunjukkan bahwa kuat tekan beton abu terbang yang dihasilkan berdekatan dengan beton acuan yaitu beton tanpa abu terbang, untuk semua kadar abu terbang yaitu sampai dengan kadar subtitusi semen oleh abu terbang sebesar 30 %. Pendekatan sand blended dapat dilakukan dalam perancangan campuran beton abu terbang.Kata Kunci : beton abu terbang, kuat tekan, pasir blendedABSTRACTThis is research was performed to know the result of the test of fly ash concrete mix designed by sand blended method. Fly ash will be treated as fine aggregate so that the total fine aggregate is the consist of fly ash and sand. 20 MPa and 30 MPa concrete mix are designed for 10 %, 20 % and 30 % by weight of cement subtitution by fly ash. Concrete mix use 20 mm maximum aggregate size, finess modulus of sand 2.768, and 6 cm and  10 cm slump. Compressive strength tests of 10 cm diameter and 20 cm height cylinder showed that the stength of fly ash concrete is the same as the strength of initial concrete. Fly ash concrete mix can be designed by sand blended approximation.Keywords : fly ash concrete, compressive strength, blended sand

Flexural Strength of the Reactive Powder Concrete

2016 ◽  
Vol 249 ◽  
pp. 108-111
Author(s):  
Michal Ženíšek ◽  
Tomáš Vlach ◽  
Lenka Laiblová
Keyword(s):  
Compressive Strength ◽  
Flexural Strength ◽  
Blast Furnace Slag ◽  
Coarse Aggregate ◽  
Aggregate Size ◽  
Reactive Powder Concrete ◽  
Quartz Powder ◽  
Granulated Blast Furnace Slag ◽  
Reactive Powder ◽  
Furnace Slag

Reactive powder concrete (RPC) is cement composite which is characterized by an absence of coarse aggregate. That resulted in a greater homogeneity of the mixture and thus also in a higher compressive strength. On the other side, the absence of coarse aggregate and typically a large volume of the paste lead to the deterioration of some of the properties of concrete. This paper deals with the relationship between maximum aggregate size and flexural strength of the reactive powder concrete without dispersed reinforcement. Quartz sand with maximum grain size of 1, 2 and 4 mm was used for the experiments. The flexural strength was measured through the four-point bending test on prisms 100 x 100 x 400 mm. Further, the quartz powder and ground granulated blast furnace slag were used as addition and compared with each other. The results of the experiments showed that the flexural strength grows with decreasing aggregate size. This tendency was observed in mixtures with quartz powder and also with ground granulated blast furnace slag. On the contrary, the compressive strength was independent on aggregate size, but dependent on the type of used addition.

Study on Preparation Technique for Low-Cost Green Reactive Powder Concrete

2006 ◽  
Vol 302-303 ◽  
pp. 405-410 ◽  
Author(s):  
Feng Xing ◽  
Li Dong Huang ◽  
Zheng Liang Cao ◽  
Liang Peng Deng
Keyword(s):  
Compressive Strength ◽  
Steel Fiber ◽  
Low Cost ◽  
Mineral Admixtures ◽  
Reactive Powder Concrete ◽  
Fine Aggregate ◽  
Preparation Technique ◽  
Quartz Powder ◽  
Reactive Powder ◽  
Preparation Techniques

Based on experiments, the effect of various types and content of mineral admixtures and steel fiber on flexural strength and compressive strength of reactive powder concrete (RPC) have been studied. The low-cost green RPC is made with the replacement of quartz sand, quartz powder and partial silica fume by natural fine aggregate and fly ash. The preparation techniques of RPC was also improved.

scholarly journals The Influence of the Use of Cement Brands on the Physical and Mechanical Properties of Reactive Powder Concrete (RPC)

2021 ◽  
Vol 2 (4) ◽  
Author(s):  
E. Sutandar ◽  
Setya Budi ◽  
F. Juniardi
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Silica Fume ◽  
Binding Capacity ◽  
Physical And Mechanical Properties ◽  
Reactive Powder Concrete ◽  
Powder Materials ◽  
Fine Aggregate ◽  
Reactive Material ◽  
Reactive Powder

The most popular building material today is concrete. Concrete is used for buildings, industrial structures, bridges, railroad sleepers, roads, dams and more. Along with the development of concrete technology is increasingly developing and innovative so as to achieve better characteristics, cheaper prices and environmentally friendly. In the early days of the development of concrete it is explained to us about the origin from ancient times to civilization to the present century of its development. In current developments, concrete already has a very high compressive strength up to 200-800 MPa, this is also called Ultra Hight Concrete (UHC). It is developed by the Reactive Powder concrete (RPC) method. Where in the research conducted, the manufacture of reactive material, namely Reactive Powder concrete (RPC) was given with a compressive strength of up to 52 MPa. The components of the RPC mixture consist of cement, fine aggregate, silica fume, superplasticizer and water. To produce a compressive strength of 52 MPa, the composition of the mixture used previous research. Detailed RPC concrete mix proportions are given in this study. Preparation and testing of materials are made in the laboratory of the Faculty of Civil Engineering in Untan. The results that will be obtained are the physical and mechanical properties of RPC Concrete. As previously explained, the manufacture of RPC concrete requires basic ingredients that include cement, fine aggregate, silica fume, superplasticizer and water mixed together. Of course, with basic ingredients with good and correct composition, the physical and mechanical properties of RPC concrete will reach the planned quality. Cement sold in the market today has PPC and PCC types. Therefore, the cement which is a binder of powder materials into a solid one plays a very important role in the formation of the best physical and mechanical properties of RPC concrete. With cement as a binding material, it is certain that the strength of RPC concrete is determined by the binding capacity of the type of cement to be used, thus RPC concrete will be obtained according to the planned quality of the plan. From the cement brands on the Indonesian market consisting of PPC and PCC cement types, it can be concluded that one of the cements using the PCC type cement brand has better physical and mechanical properties than the PPC type cement brand. And all brands of cement with PCC type produce compressive strength > 52 MPa. So, in the manufacture of RPC concrete it is recommended to use a cement brand with PCC type.

Tests on Mechanical Properties and Anti-Penetration Performance of Steel-Fiber Reactive Powder Concrete

2013 ◽  
Vol 671-674 ◽  
pp. 1761-1765
Author(s):  
Yong Liu ◽  
Chun Ming Song ◽  
Song Lin Yue
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Fracture Toughness ◽  
Compressive Strength ◽  
Reinforced Concrete ◽  
Steel Fiber ◽  
Reactive Powder Concrete ◽  
Calculation Results ◽  
Reactive Powder ◽  
Penetration Tests

In order to get mechanical properties ,some RPC samples with 5% steel fiber are tested, many groups data were obtained such as compressive strength, shear strength and fracture toughness. And a group of tests on RPC with 5% steel-fiber under penetration were also conducted to validate the performance to impact. The penetration tests are carried out by the semi-AP projectiles with the diameter of 57 mm and earth penetrators with the diameter of 80 mm, and velocities of the two kinds of projectiles are 300～600 m/s and 800～900 m/s, respectively. By contrast between the experimental data and the calculation results of C30 reinforced concrete by using experiential formula under penetration, it shows that the resistance of steel-fiber RPC to penetration is 3 times as that of general C30 reinforced concrete.

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