Compressive strength of solid clay brickwork of masonry bridges: Estimate through Schmidt Hammer tests

Brencich, Antonio; Łątka, Dawid; Matysek, Piotr; Orbán, Zoltán; Sterpi, Enrico

doi:10.1016/j.conbuildmat.2021.124494

Cited by 16 publications

(16 citation statements)

References 35 publications

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“…Fine-grained cohesive soil should be stabilised before its use in construction work (Dahlin et al, 1999;She et al, 2019;Lindh, 2004;Zhou et al, 2017;Lemenkov and Lemenkova, 2021a). Stabilisation improves the engineering properties of finegrained soil by increasing its compressive strength (Brencich et al, 2021;Lemenkov and Lemenkova, 2021b;Wu et al, 2021), reducing its plasticity (Kasprzhitskii et al, 2016) and shrinkswell potential (Chen et al, 2002;Saride et al, 2013), and im-proving its mineralogical, morphological and structural characteristics (James, 2020;Wang et al, 2021). These improvements result in a higher bearing capacity, reduced settlement, and more predictable behavior of the problematic soil.…”

Section: Introductionmentioning

confidence: 99%

Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization

Lindh

Lemenkova

2023

Slovak Journal of Civil Engineering

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This study is aimed at evaluating the strength of stabilised soil collected from the Port of Norvik, Stockholm, Sweden, where 350,000 m3 of clay had to be stabilized. The tests were performed in the laboratory of the Swedish Geotechnical Institute (SGI). The soil was stabilised by binder mixtures using Portland cement clinker (PCC) and lime and lime kiln dust (LKD). Accelerators (X-seed 100 BASF, PCC, LKD and salt) were added to the soil samples for quicker stabilization. The strength of the stabilised soil was assessed using resonance frequency measurements of seismic P-waves by an ICP accelerometer in order to estimate the shear strength of the soil and to evaluate the effects from the accelerators, binder ratios, and the curing temperature on the gains in stabilization and strength. Various proportions of the binders were tested, i.e.: 50/50 cement/lime and 50/50 PCC/lime. The temperature was measured using a calorimeter in double experiments. The results showed that the accelerators improve the strength in the stabilized specimens and enhance the soil performance for engineering construction work.

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Section: Introductionmentioning

confidence: 99%

Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization

Lindh

Lemenkova

2023

Slovak Journal of Civil Engineering

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“…It is difficult to analyzed the old masonry structures as the code were not available in order to reveal the minimum required information for the building design, Dubey et al, Ramos et al (2006), Pena et al (2008). The mechanical properties of old materials are difficult and challenging task, but previous researchers have performed numerical and experimental study on ancient structures to evaluate the material properties by Beconcini et al (2001), Drdacky (2006), Brencich and Sterpi (2006), Russo et al (2010). The mechanical properties are evaluated from three testing (destructive testing, minor destructive testing and non-destructive testing) performed on the historical monumental structures.…”

Section: Introductionmentioning

confidence: 99%

“…The many researchers have conducted numerous tests on the old structural materials to evaluate the actual mechanical properties by Beconcini et al (2001). The numerical and experimental testing has performed on the buildings and towers to get the actual mechanical properties of the masonry by Drdacky (2006), Brencich and Sterpi (2006).…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Ground Floor level of Old Unreinforced Masonry Senate Hall building using macro modelling approach

Kumar

Pallav

2023

Preprint

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Finite element (FE) macro 3D modelling of the unreinforced masonry (URM) wall of ground floor (GF) is evaluated for static and dynamic behavior and compared with an actual in-situ condition of the building. The Senate Hall (SH) building is built in 1915 (108 years old), designed from Indo-Saracenic style of architecture. In-situ survey and geometrical drawing of the building is used for entire modelling the unreinforced masonry load bearing (thickness 1.07m) and the partition walls (0.91m to 0.31m) on the ground floor level. A site visit of the building has been answered several unknown features such as geometrical plan, construction techniques, mechanical properties, architecture style, damaging maps (cracks, failures, damages, collapse, etc.), strengthening, renovation, retrofitting and actual conditions of the SH building. The major cracks and material deformities are observed in load bearing walls and arches. Most of the construction material deteriorated due to water seepage, moisture, and atmospheric behavior, etc. The finite element technique has been used for built 3D model of entire GF level of the SH building using macro modelling approach. The mechanical properties have been evaluated from non-destructive tests performed on the masonry and stone materials of the building after used approximate values. Static analysis results show the maximum stress and deformation response of the GF level for its self-weight and live load. Dynamic modal analysis results are also shown. Finally, simulation results of the GF level have been compared with the actual in-situ survey condition of the SH building.

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“…Taking into account the obvious needs of the market and the environment for "green" solutions, strategies for the development of the construction materials industry have been adopted in a number of countries [7][8][9]. The strategies are focused on alternative versions of construction products manufactured using some industrial wastes [10,11].…”

Section: Introductionmentioning

confidence: 99%

Carbon-containing modifier for fluoranhydrite binder

Gordina¹,

Gumenyuk²,

Polyanskikh³

et al. 2022

Nanobuild

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Introduction.In order to widen the functionality of construction and building materials and widespread electrically conductive building constructions, it is highly recommended to reduce cost of the solutions. This can be achieved by replacing binders with the industrial by-products. At the same time, there are a few articles about adjustment of electrically conductive properties of materials based on by-product binders and this field is of a great importance. Also, highly dispersed particles in modifiers and their role might be considered as important to find out, especially when such additives are used to improve structure and properties of composites. Methods and materials. To study the possibility of controlling the electrical properties of the matrix, compositions based on fluoroanhydrite, sodium sulfate as a hardening activator, and UPC-MIX-1 suspension as an electrically conductive additive, were made. The effect of UPC-MIX-1 suspension on the electrical performance and structure formation of a mineral matrix containing dispersed carbon black particles was studied. The polydisperse nature of the modifying additive and the ratio of the nanodispersed and microdispersed parts of the solid phase were determined. Indicators for calculating the specific volumetric electrical resistance were determined by the probe method. The influence of the dispersed additive on the characteristics of the fluoroanhydrite composite was evaluated by standard laboratory methods. Features of structure formation were evaluated using the methods of physicochemical analysis. Results and discussion. It was confirmed that a fluoranhydrite-based mineral binder with sodium sulfate has moderate physical mechanical properties and might be used as a substitute for gypsum binder. The usage of an electrically conductive additive as a modifier enhances such mechanical properties as flexural compressive strength and compressive strength which increase by 51% and 65% correspondingly. Also, hydro physical properties have been improved, for instance the coefficient of softening for the FD-4 sample has increased by 39%, and the water absorption by mass for the same sample has decreased by 36%. Specific volume electrical resistance has decreased by 49-52% and equals13,6 kOm • cm, 8% of electrically conductive additive being added. The physical and technical properties of the presented composite are due to significant changes of the physical and chemical properties including the features of structure formation. Conclusions. The obtained compositions require extra optimization in order to be used as a heating component. At the same time, the achieved electrical conductivity is sufficient to level the electrostatic effect of self-leveling floors. Regularities in the formation of the structure of the fluoroanhydrite composite have been established, which manifest themselves in the formation of a larger number of contacts for the intergrowth of crystalline hydrate new formations ensured by the presence of a nanodispersed part in the modifying additive.

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Compressive strength of solid clay brickwork of masonry bridges: Estimate through Schmidt Hammer tests

Cited by 16 publications

References 35 publications

Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization

Hardening Accelerators (X-Seed 100 BASF, PCC, LKD and SALT) as Strength-Enhancing Admixture Solutions for Soil Stabilization

Finite Element Analysis of Ground Floor level of Old Unreinforced Masonry Senate Hall building using macro modelling approach

Carbon-containing modifier for fluoranhydrite binder

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