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  1. Self-consolidating concrete : applying what we know
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  3. TB-1505 — Self-Consolidating Concrete (SCC) Production Tips Technical Bulletin
  4. Self-Consolidating Concrete: Applying what we know by Joseph A. Daczko, Hardcover | Barnes & Noble®

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Using self-compacting concrete produce several benefits and advantages over regular concrete.

Self-consolidating concrete : applying what we know

Some of those benefits are:. Using self-compacting concrete must not be used indiscriminately. These factors can affect the behavior and performance of self-compacting concrete:. Self-compacting concrete can have benefits and will shorten your construction time. However, special attention should be focused on:. The Balance Small Business uses cookies to provide you with a great user experience. By using The Balance Small Business, you accept our. Innovation New Specifications. Design Innovation. By Juan Rodriguez. Improved constructability. Labor reduction.

Bond to reinforcing steel. Improved structural Integrity.

Accelerates project schedules. Reduces skilled labor. The high flowability may lead to segregation, which is presented in a form of separation of large CA particles from the mortar matrix. Segregation is a major problem and should be avoided during the production of SCC to avoid any improper results. To overcome this problem, all concrete samples were filled in a consistent technique with a strict quality control. The J-Ring test is performed for all mixtures to measure the passing ability of the concrete through obstacles.

The difference between the slump flow and J-Ring flow is an indication of the passing ability of the concrete. The orientation of the mold for the J-Ring test and for the slump flow test without the J-Ring shall be the same. The increase in flowability of concrete mixtures made with high content of slag and fly ash is attributed to the fact spherical shape of fly ash and slag particles, which enhance concrete flow. Most of the specimens were satisfied the target value of T This behavior was also observed visually while performing the slump-flow test in which, concrete took longer time to reach a full stop.

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Split tensile results clearly indicate that the split tensile strength reduced due to the addition of RAP. This article is published under license to BioMed Central Ltd. Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author s and the source are credited. Skip to main content Skip to sections. Advertisement Hide. Download PDF. Open Access.

First Online: 22 May The objective of this study is to investigate the effect of sustainable technologies, fly ash, slag, and RAP, on fresh and hardened properties of SCC. SCC laboratory testing: the experimental program in this study included: a Fresh properties: slump flow-test. T 50 , J-Ring, and segregation. The aggregate gradation is illustrated in Fig. The relative specific gravity and absorption at saturated surface dry condition of CA were 2. Type I Portland cement having a specific gravity of 3. Different binders incorporating ASTM type I cement and a combination of one or more SCMs including class C fly ash, and ground granulated blast furnace slag were also used in mixtures other than the controls.

Thus, no additional dosages of VMA were added to the mixtures. In order to keep gradation constant for all mixes regardless of RAP content, the RAP materials were sieved and separated into different sieve sizes. Different RAP sizes were then combined, with proportions selected such that the RAP gradation matches the gradation of the crushed limestone used in this study. The relative specific gravity of RAP was 2.

TB-1505 — Self-Consolidating Concrete (SCC) Production Tips Technical Bulletin

Open image in new window. It is shown in Fig. All mixtures behaved well except mixtures M1, M3, and M12 showed some accumulation of the CA at the middle of the concrete pie. Split tensile results are summarized in Fig. The results clearly indicate that the split tensile strength dropped due to the addition of RAP. Two different trends were dictated in the split tensile strength reduction.

In addition to the importance of ultimate compressive strength of concrete, another important measure of concrete strength is the rate of compressive strength development. So, even though the compressive strength development rate is important, its only relevant if the mix satisfy target strength required by specifications, which will be studied in the next section. As shown in Fig. As illustrated in Fig. The analysis in this section showed a general trend of reduction in SCC strength with the addition of RAP, fly ash, and slag in the different combinations described above, however, the important factor is the target strength and whether its achieved or not.

The specifications of the IDOT were adopted to conduct this analysis. The results indicate that 1 mix failed the patching application requirement, 2 mixes failed the pavements and structures requirement and 3 mixes failed the bridge superstructures requirement.

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Twelve SCC mixes incorporating different proportions of RAP, fly ash and slag were prepared and tested in the lab, testing results indicated a general trend of drop in concrete strength with the increase of SCMs and RAP content. However, the reduction in strength was not sever in all cases, as many of the mixes based IDOT requirement for pavements and bridges. Altoubat, S. Toward a sustainable SCC through the use of high volume fly ash and slag to reduce cement in SCC and the effect on its cracking potential.

Self-Consolidating Concrete: Applying what we know by Joseph A. Daczko, Hardcover | Barnes & Noble®

Google Scholar. Amrutha, N. Chloride-ion impermeability of self-compacting high volume of fly ash concrete mixes.