Flexural Behavior of Precast Reinforced Concrete Members With Cementless Concrete and Its Application to Sewer Pipes

Hata, Minoru; Sugimoto, Katsumi; Hayashi, Etsuro; Iwasa, Yukitoshi; Igawa, Hideki; Miyazawa, S.

doi:10.2208/jscejmcs.77.4_164

Cited by 2 publications

(3 citation statements)

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“…These experimental results clearly show that IBPM concrete has better performance regarding chloride ion diffusion and sulfuric acid resistance than OPC concrete. As reported in a published paper [ 19 ], the other durability performances, such as freeze–thaw resistance and abrasion resistance of IBPM concrete are equivalent to those of OPC concrete.…”

Section: Durability Of Ibpm Concretementioning

confidence: 73%

“…According to previous studies [ 19 ], the compressive strength of IBPM concrete (W/B = 0.34), under standard under-water curing at 20 °C, was only about 3 N/mm 2 at the age of 1 day. As a result, the concrete was still in a fragile state and adhered to the surface of the formwork, causing partial separation, and making it difficult to remove the formwork.…”

Section: Compressive Strength Of Ibpm Concretementioning

confidence: 92%

“…As a result, the concrete was still in a fragile state and adhered to the surface of the formwork, causing partial separation, and making it difficult to remove the formwork. On the other hand, in the case of steam curing, the compressive strength was 33 N/mm 2 at the age of 1 day after the completion of steam curing [ 19 ]. Based on this, it was found that proper strength development of IBPM can be obtained by steam curing, and sufficient strength can be secured for demolding at the age of 1 day.…”

Section: Compressive Strength Of Ibpm Concretementioning

confidence: 99%

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Experimental Study on the Application of Cementless Material with Industrial By-Products to Steam-Cured Precast Concrete Products

Hata¹,

Sato²,

Miyazawa

2022

Materials

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The purpose of this study was to apply a cementless binder using industrial by-products (fly ash, ground-granulated blast furnace slag, and silica fume) to precast concrete products. In this binder, calcium hydroxide was included as an alkali stimulant but Portland cement was not included. Experiments on the compressive strength and durability of this type of material were conducted and its applicability to precast concrete products was investigated using full-scale specimens. The experiments proved that high-temperature steam curing is effective at obtaining strength development and that compressive strength can be expressed as a linear function of the binder–water ratio. Experimental results of chloride ion diffusion coefficient and sulfuric acid resistance suggested that the proposed material has higher resistances than conventional cement concrete against these deterioration factors. It was also demonstrated that full-scale specimens of a box culvert and a centrifugally compacted pipe using this type of material have almost the same load-bearing capacity and deformation performance as those using conventional cement concrete. It is believed that the proposed material could be used as a construction material instead of cement concrete, contribute to reducing CO2 emission, and increase the reuse of industrial by-products.

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Section: Durability Of Ibpm Concretementioning

confidence: 73%

Section: Compressive Strength Of Ibpm Concretementioning

confidence: 92%

Section: Compressive Strength Of Ibpm Concretementioning

confidence: 99%

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