Features of non-destructive testing of existing masonry structures made of autoclaved aerated concrete units

IF 0.5 4区 工程技术 Q4 CONSTRUCTION & BUILDING TECHNOLOGY Cement Wapno Beton Pub Date : 2022-01-01 DOI:10.32047/cwb.2022.27.3.3
R. Jasiński, Ł. Drobiec, W. Mazur
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Abstract

The article describes the possibilities of non-destructive testing of existing structures, made of autoclaved aerated concrete [AAC] masonry units. Relationships that allow the determination of the normalized compressive strength of autoclaved aerated concrete, were developed with the MDT semi-non-destructive method. The general form of the Neville curve, known from the diagnosis of plain concrete was used, which was calibrated to AAC of nominal density classes 400, 500, 600 and 700. The tests were performed and additional empirical relationships were built, to allow for the influence of density and moisture. Moreover, an ultrasonic non-destructive NDT method calibrated on standard cubic 100 × 100 ×100 mm samples of various densities and moisture, is presented. In addition to the non-destructive ultrasound method, the sclerometric method, calibrated on the entire masonry elements, limited to one nominal density of 600 kg/m3 with varying moisture, was also used. A practical application of AAC strength assessment in the existing masonry structure, has been presented.
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既有蒸压加气混凝土砌体结构无损检测特点
本文描述了现有结构无损检测的可能性,由蒸压加气混凝土[AAC]砌体单元制成。关系,允许确定蒸压加气混凝土的归一化抗压强度,开发与MDT半无损方法。内维尔曲线的一般形式,从普通混凝土的诊断已知,它被校准到标称密度等级400、500、600和700的AAC。进行了测试并建立了额外的经验关系,以考虑密度和湿度的影响。此外,提出了一种针对不同密度和湿度的标准立方100 ×100 ×100 mm样品的超声无损检测方法。除了非破坏性超声方法外,还使用了对整个砌体构件进行校准的硬度法,该方法在不同湿度下的标称密度限制为600 kg/m3。介绍了AAC强度评定在既有砌体结构中的实际应用。
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来源期刊
Cement Wapno Beton
Cement Wapno Beton CONSTRUCTION & BUILDING TECHNOLOGY-MATERIALS SCIENCE, COMPOSITES
CiteScore
1.30
自引率
28.60%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Publisher of the scientific bimonthly of international circulation, entitled "Cement-Wapno-Beton" ["Cement-Lime-Concrete"], is the Fundacja Cement, Wapno, Beton [Foundation Cement, Lime, Concrete]. The periodical is dedicated to the issues concerning mineral setting materials and concrete. It is concerned with the publication of academic and research works from the field of chemistry and technology of building setting materials and concrete
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