Bottom-Up Concreting into Steel Tube Column Filled with Ultra High-Strength Concrete Using Silica Fume

Yonezawa, Takeshi; Okuno, Tsumuko; Mitsui, Kenrou; Numakura, N.; Oura, Takashi; Sato, Masahiko

doi:10.3151/coj1975.31.12_22

Cited by 6 publications

(1 citation statement)

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“…Hitherto, there have been no in-depth studies concerning this effect. However, the technological findings from the implementation on construction sites and laboratory tests (increased pressure on the formwork) and the recommendations for constructing concrete elements in this technology are included in international standards and scientific papers [1,2,[21][22][23][24][25]. It is observed that there is a growing interest in this technology within the construction industry, so it would seem appropriate to investigate the effect and its impact on the parameters of the hardened concrete, including its bond to reinforcing bars.…”

Section: Introductionmentioning

confidence: 99%

Effect of Placing Self-Compacting Concrete Bottom up on the Quality of Bond Conditions

Kucharska

Dybeł

2020

Materials

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A self-compacting concrete (SCC) mixture, due to its special rheological properties, may be placed differently than in traditional variants. The paper presents the results of a study on the effect of a bottom-up placing direction on the quality of bond conditions between steel and self-compacting concrete. Elements with overall dimensions of 160 × 480 × 1600 mm consisting of elementary samples with dimensions of the bond test basic modules were constructed. Ribbed steel rebars with diameters of 16 mm were used and located in formworks perpendicularly to the concrete placing direction. Bond tests were carried out according to the pull-out method. The bottom-up placing contributed to the uniformity of the bond conditions quality in the test elements and an overall improvement of the bond properties, especially in its top part. Given the increasing implementation of alternative methods of mix placing and the promising results, the topic should be further investigated.

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Section: Introductionmentioning

confidence: 99%