Comparative study between the Cost of Normal Concrete and Reactive Powder Concrete

An experimental program was directed in this study to evaluate the abrasion resistance of reactive powder concrete (RPC) under direct normal impact of water jet. Abrasion and compressive strength specimens were cast from six RPC mixtures using different single and hybrid distributions of 6 mm-length and 15 mm-length micros-steel fibers and 18 mm-length polypropylene fiber. Fixed mix proportions were used for the six RPC mixtures and with fixed total volumetric fiber content of 2.5%. In addition to the RPC mixtures, a normal concrete mixture was prepared for comparison purposes. All specimens were cured in the same conditions and tested at an age of 28 days. The test results showed that abrasion weight losses increase with time at rates that are independent of fiber type and fiber distribution. The results also showed that all RPC mixtures exhibited significantly lower abrasion losses than normal concrete. The lowest percentage abrasion weight losses were recorded for the mixture with pure 15 mm micro-steel, where after 12 testing hours, it was 0.41% of the total weight before testing. On the other hand, the mixture with pure 6 mm micro-steel fiber exhibited the highest percentage abrasion weight loss (0.98%) among the six RPC mixtures. Another conclusion is that the inclusion of polypropylene fiber to compose hybrid fiber distribution with micro-steel fiber led mostly to lower abrasion losses.

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Providing a framework for optimizing a mixing design of reactive powder concrete (RPC)

Organization Technology and Management in Construction An International Journal ◽

10.2478/otmcj-2020-0024 ◽

2021 ◽

Vol 13 (1) ◽

pp. 2438-2449

Author(s):

Farid Ghaffari Moghaddam ◽

Abbas Akbarpour ◽

Afshin Firouzi

Keyword(s):

Compressive Strength ◽

Final Analysis ◽

Mix Design ◽

Reactive Powder Concrete ◽

Water Penetration ◽

Expert Choice ◽

Optimal Mix ◽

Compressive Performance ◽

Reactive Powder ◽

The Cost

Abstract Suitable distribution of particles and the presence of hydration lead to the improved compressive performance and optimum (even reduced) cost in the production of reactive powder concrete (RPC). This study was conducted to obtain a better understanding of RPC and analyze the behavior of modified RPC (MRPC) using the properties of surface resistivity, water penetration, compressive strength, and modulus of elasticity, apart from the cost. The present study was carried out to investigate how to optimize the size and diversity of the aggregate in order to increase the applications and reduce the costs. The options were selected from among the 12 alternatives classified during the construction stages. According to the six weighting parameters used for comparing with the sample, the derived framework can be described as a mixing design for RPC. Five weighting criteria were considered with values of one of the five criteria missing, and in one case, all criteria were taken with equal weights. For the final analysis, the Expert Choice software was used to create a framework for the optimal mix design of RPC and MRPC. The MRPC mixing designs showed good results, with very slight differences compared to RPC. In many cases, MRPC can be used instead of RPC.

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Experimental Investigation of Short Square Normal and Hybrid Fiber Reactive Powder Concrete Columns Subjected to Chloride Solution Attack

Journal of Engineering ◽

10.31026/j.eng.2018.07.06 ◽

2018 ◽

Vol 24 (7) ◽

pp. 75

Author(s):

Mohammed Mosleh Salman ◽

Husain Khalaf Jarallah ◽

Raed Satar Al-Behadili

Keyword(s):

Tap Water ◽

Load Capacity ◽

Concrete Columns ◽

Experimental Program ◽

Reactive Powder Concrete ◽

Normal Concrete ◽

Ultimate Load Capacity ◽

Eccentric Load ◽

Chloride Water ◽

Reactive Powder

In this research, the structural behavior of reinforced concrete columns made of normal and hybrid reactive powder concrete (hybrid by steel and polypropylene fibers) subjected to chloride salts with concentration was 8341.6 mg/l. The study consists of two parts, the first one is experimental study and the second one is theoretical analysis. Three main variables were adopted in the experimental program; concrete type, curing type and loading arrangement. Twenty (120x120x1200) mm columns were cast and tested depending on these variables. The samples were reinforced using two different bars; Ø8 for ties and Ø12 with minimum longitudinal reinforcement (0.01Ag). The specimens were divided into two main groups based on curing type: The first group consists of casting and testing of ten columns that cured in tap water for 28 days with two types of concrete (normal and hybrid), five columns for each type. While the second group consists of ten columns that direct cured and fully immersed in chloride water (8341.6 mg/l) 6 months with two types of concrete (normal and hybrid), five columns for each type. The specimens were tested under three types of loading, the first one is axial load, the second one is eccentric load with three different eccentricities (50,100 and 150) mm and where (e/h) are (0.42, 0.83 and 1.25) respectively from the center of column while the third type of loading is tested the specimens as beam. The experimental results showed an increase in ultimate load capacity and higher chlorides resisting for hybrid reactive powder concrete in comparison with normal concrete in both types of curing (tap and chloride water) through studying strain profile. Interaction diagram charts were obtained from different types of loading for each specimen. These charts showed high values for hybrid reactive powder concrete in comparison with normal concrete.

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Comparative Study of Reactive and Modified Reactive Powder Concrete

International Journal for Research in Applied Science and Engineering Technology ◽

10.22214/ijraset.2018.4025 ◽

2018 ◽

Vol 6 (4) ◽

pp. 121-126

Author(s):

V. Nandini

Keyword(s):

Comparative Study ◽

Reactive Powder Concrete ◽

Reactive Powder

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Flexural Behavior of Reactive Powder Concrete with Hybrid Section T- Beams

10.21203/rs.3.rs-1051508/v1 ◽

2021 ◽

Author(s):

Rafid Saeed Atea

Keyword(s):

Silica Fume ◽

Flexural Behavior ◽

Experimental Program ◽

Reactive Powder Concrete ◽

Normal Concrete ◽

Hybrid Beams ◽

Hybrid Section ◽

Current Duration ◽

Reactive Powder ◽

T Beam

Abstract Reactive powder concrete (RPC) is unique of the present and greatest significant improvements in constructions field, it has usual excessive kindness happening current duration in the world owing toward its higher concrete properties, great ductility, durability, shrinkage, great opposition to corrosion and abrasion. In this experimental investigation is carried out on the way to revision the RPC flexural activity with Hybrid Segment T- Beams and the mechanical characteristics of this building material. In order to analyze the belongings of steel fiber volumetric ratio, silica fume ratio, tensile steel ratio, hybrid section on RPC T-beam flexural efficiency, the experimental program included testing five beams. The study was focused on determining the load-deflection behavior, letdown mode, strain supply across the depth of the beams and crack pattern at failure. The results of the volumetric ratio of steel fibers and the silica fume ratio were also considered in studying the mechanical properties of RPC mixes. Moreover, a study of hybrid beams showed that use of RPC web and normal concrete in flange efficiently improves the performance of T-beams compared to normal concrete T-beams with a percentage rise of 12 percent and hybrid beams have also shown that the use of RPC flange and normal concrete in web efficiently improves the display of T-beams associated to regular concrete T-beams with percentages increase of 28%.

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Ductility Improvement of R.C Beams with Large Web opening by using Reactive Powder Concrete Layers

Tikrit Journal of Engineering Sciences ◽

10.25130/tjes.25.3.06 ◽

2018 ◽

Vol 25 (3) ◽

pp. 30-39

Author(s):

Husain Khalaf Jarallah ◽

Nidaa Qassim Jassim

Keyword(s):

Ultimate Load ◽

Concrete Beams ◽

Reinforced Concrete Beams ◽

Reactive Powder Concrete ◽

Normal Concrete ◽

Simply Supported ◽

Hybrid Beam ◽

Web Opening ◽

Hybrid Beams ◽

Reactive Powder

In this investigation the effect of large web opening on the on the behaver of beams made by normal concrete (NC) and reactive powder concrete (RPC) have been studied. The experimental work consists of casting and testing in flexure 12 rectangular simply supported reinforced concrete beams. The main parameters of this test are opening locations and normal concrete and RPC location with is the section. The ultimate loads, cracking loads, load -deflection behavior, skew of the openings (deflection at the two opposite corners of openings) and ductility were discussed. These results showed that increase ultimate loads (Pu) and stiffness by increase RPC layers. The using RPC layers increase ultimate load about (1-30) %. Using RPC in compression fiber is found to be more effective than using RPC in tension fiber. The cracking load of hybrid beam with one layer of RPC in compression fiber (having one opening) higher than NC beams by 48.5%. The ultimate strength was decreases with increases opening about (4-21)%, thus indicating that the stiffness decreases accordingly. Hybrid beams with RPC in tension fiber failed with less crack than those for hybrid beams with RPC in compression fiber at the same number of openings. The skew at opening of flexural zone show greater values than the skew at opening in shear zone for each beam until failure. The increase in the number of openings leads to increase in the ductility because it reduces the strength of beams.

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REACTIVE POWDER CONCRETE DENGAN SUMBER SILIKA DARI LIMBAH BAHAN ORGANIK

Teras Jurnal ◽

10.29103/tj.v3i2.41 ◽

2017 ◽

Vol 3 (2) ◽

pp. 157

Author(s):

Yulius Rief Alkhaly

Keyword(s):

Silica Fume ◽

High Strength Concrete ◽

High Performance ◽

High Strength ◽

Reactive Powder Concrete ◽

Normal Concrete ◽

Green Concrete ◽

Strength Concrete ◽

Reactive Powder

Reactive powder concrete (RPC) merupakan varian baru dari beton mutu ultra tingggi (ultra high strength concrete) yang diperkenalkan kepada umum pertama kali pada tahun 1994. Beton modern ini memiliki beberapa keunggulan dibandingkan beton konvensional (normal concrete) atau beton kinerja tinggi (high performance concretes). Penelitian tentang RPC di Indonesi masih sangat terbatas, RPC pertama bermaterial lokal Indonesia dikembangkan tahun 2009, dengan sumber silika berasal dari silica fume. Sebagai bagian dari berbagai penelitian lanjutan tentang RPC, hasil akhir dari riset ini diharapkan dapat menghasilkan RPC yang benar-benar sesuai dengan karakteristik material di Indonesia. Sumber silika yang digunakan berasal dari limbah bahan organik sehingga dapat menekan biaya produksi dan menghasilan green concrete yang dapat mengurangi dampak negatif limbah terhadap lingkungan.Kata kunci: Reactive Powder Concrete, Silika, Limbah Bahan Organik

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