A Method to Estimate the Early Age Compressive Strength of Concrete Before Demolding Using a Pin Penetration Device

Nishiwaki, Tomoya; TAKASUGI, Fumiya; NARANTOGTOKH, Bayarjavkhlan; Hara, Shoumi; Maliha, Maisha

doi:10.3130/aijs.88.18

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…When the compressive strength is less than 5 MPa, the depth of penetration shows significant variation. However, the obtained result was different from the previous curve which was determined in laboratory experiments [35]. The compressive strength range that can be estimated by the proposed method in this study is set to 3 MPa to 15 MPa.…”

Section: Relationship Between Compressive Strength and Penetration Depthmentioning

confidence: 60%

“…This device was originally developed to estimate the degree of decay or deterioration of wood based on the penetration depth. In previous studies [32,35], this device was employed to determine the compressive strength of concrete on the cubic mold in laboratory-scale. No result has been verified on full-size mock-up specimens and/or actual construction sites.…”

Section: Pin Penetration Testing Devicementioning

confidence: 99%

“…Second, this method is suitable to use for low strength concrete. However, the previous studies [35] have only shown the effectiveness of this method on laboratory-sized specimens and have not examined it on full-size concrete specimens, which may include different conditions, e.g., compaction conditions and uncontrolled temperature. In this study, the applicability of this strength estimation method at actual construction is investigated.…”

Section: Introductionmentioning

confidence: 99%

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A New Methodology to Estimate the Early Age Compressive Strength of Concrete Before Demolding

Narantogtokh,

Nishiwaki,

Takasugi

et al. 2024

Preprint

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Non-destructive testing has many advantages, such as the ability to obtain a large number of data without destroying existing structures. However, the reliability of the estimation accuracy and the limited range of applicable targets remains an issue. This study proposes to a novel pin penetration test method to determine the early age compressive strength of concrete before demolding. The timing of demolding and initial curing are determined according to the strength development of concrete. Therefore, it is important to determine the compressive strength at the early age before demolding at the actual construction site. The applicability of this strength estimation methodology at actual construction is investigated. Small test holes (12 mm in diameter) are prepared on the mold surface in real construction sites and mock-up specimens in advance. The pin is penetrated into these test holes to obtain the relationship between the compressive strength and the penetration depth. As a result, it is confirmed that the pin penetration test method is suitable to measure the early age compressive strength at actual construction site. This allows the benchmark values for compressive strength, necessary to avoid early frost damage, to be directly verified on the concrete structural members at the construction site. For instance, the compressive strengths of greater than 5 MPa and 10 MPa can be confirmed by the penetration depths benchmark values of 8.0 mm and 6.7mm or less, respectively.

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Section: Relationship Between Compressive Strength and Penetration Depthmentioning

confidence: 60%

Section: Pin Penetration Testing Devicementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Methodology to Estimate the Early Age Compressive Strength of Concrete Before Demolding

Narantogtokh,

Nishiwaki,

Takasugi

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

A New Methodology to Estimate the Early-Age Compressive Strength of Concrete before Demolding

Narantogtokh,

Nishiwaki,

Takasugi

et al. 2024

Buildings

View full text Add to dashboard Cite

Non-destructive testing has many advantages, such as the ability to obtain a large number of data without destroying existing structures. However, the reliability of the estimation accuracy and the limited range of applicable targets remain an issue. This study proposes a novel pin penetration test method to determine the early-age compressive strength of concrete before demolding. The timing of demolding and initial curing is determined according to the strength development of concrete. Therefore, it is important to determine the compressive strength at an early age before demolding at the actual construction site. The applicability of this strength estimation methodology at actual construction is investigated. Small test holes (12 mm in diameter) are prepared on the mold surface in real construction sites and mock-up specimens in advance. The pin is penetrated into these test holes to obtain the relationship between the compressive strength and the penetration depth. As a result, it is confirmed that the pin penetration test method is suitable for measuring the early-age compressive strength at the actual construction site. This allows the benchmark values for compressive strength, necessary to avoid early frost damage, to be directly verified on the concrete structural members at the construction site. For instance, the compressive strengths of greater than 5 MPa and 10 MPa can be confirmed by the penetration depths benchmark values of 8.0 mm and 6.7 mm or less, respectively.

show abstract

A Method to Estimate the Early Age Compressive Strength of Concrete Before Demolding Using a Pin Penetration Device

Cited by 2 publications

References 9 publications

A New Methodology to Estimate the Early Age Compressive Strength of Concrete Before Demolding

A New Methodology to Estimate the Early Age Compressive Strength of Concrete Before Demolding

A New Methodology to Estimate the Early-Age Compressive Strength of Concrete before Demolding

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