Development of the Strength of Concrete

Rüsch, Hubert; Jungwirth, Dieter; Hilsdorf, Hubert K.

doi:10.1007/978-1-4612-5424-9_7

Cited by 4 publications

(5 citation statements)

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“…Here, for different mixing designs, f c 7 /f c 28 varies from 0.74 to 0.85, whereas f c 90 /f c 28 changes from 1.08 to 1.15. This second value is lower to the one reported in [63], whereas the first ratio is larger than the reference value.…”

Section: Comparison Of Concrete Compressive Strength Over Timecontrasting

confidence: 69%

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The Effect of Electric Arc Furnace Dust (EAFD) on Improving Characteristics of Conventional Concrete

Saeb,

Capitán,

Cobo

2023

Buildings

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The steel industry is one of the key industries and its use is inevitable in many industries including construction. In addition to steel, this industry produces massive amounts of electric arc furnace dust (EAFD) that is classified as hazardous waste. Using this material as an admixture can improve the characteristics of concrete, neutralize potential risks and be beneficial to the circular economy. Considering the differences in EAFD between different steel companies, which in turn is caused by the type and percentage of input materials, the optimal percentage and specific application of EAFD from steel companies of each region is unique. In the present study, samples from 11 different sources of EAFD in Khuzestan Steel Company (KSC) were collected. Then, they were classified into three groups depending on the size and origin (fine and coarse, both obtained by filtering those particle sizes directly from furnaces, and a third class obtained in the interior of the steelmaking site close to material handling (MH) belt conveyors) based on their physical and chemical characteristics. To test the effect of EADF as an admixture, several conventional concrete samples were prepared by replacing 0% (control), 2%, 5% and 8% of cement with each EAFD group. Finally, the resulting material was characterized through several tests, namely: (i) compressive strength test at 7, 28 and 90 days, (ii) depth of water penetration under pressure test and (iii) electrical indication of concrete’s ability to resist chloride ion penetration. The result shows that replacing 2% of the cement with MH caused the largest improvement in compressive strength of 7 day concrete, but also showed negative effect on water penetration, while coarse had a negative effect in almost all tests except in the chloride ion penetration test. The best results were obtained by replacing with 2% of cement with fine EAFD, showing significant improvements in all tests, as well as in the observed trend of increasing compressive strength over time.

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Section: Comparison Of Concrete Compressive Strength Over Timecontrasting

confidence: 69%

“…Reference values for the ratios for ASTM C150 [46] type II Portland cement (OPC) are f c 7 /f c 28 = 0.68 and f c 90 /f c 28 = 1.2 (see Ref. [63]). Those ratios were calculated in our experiment for all percentages and all mixing designs, and the results are shown Figure 10.…”

Section: Comparison Of Concrete Compressive Strength Over Timementioning

confidence: 99%

The Effect of Electric Arc Furnace Dust (EAFD) on Improving Characteristics of Conventional Concrete

Saeb,

Capitán,

Cobo

2023

Buildings

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“…Furthermore, it should be noted that shrinkage is probably the most common cause of structural cracking [37,38]. If not controlled, the deformation due to shrinkage can lead to durability problems and even shear stress [39,40]. The SS-PCM could be used as a mitigation agent to reduce the drying shrinkage of cementitious materials.…”

Section: Volume Stability: Drying Shrinkagementioning

confidence: 99%

Properties and Durability of Cementitious Composites Incorporating Solid-Solid Phase Change Materials

Rmili,

Ndiaye,

Plancher

et al. 2024

Applied Sciences

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This paper investigates the properties and durability of cementitious composites incorporating solid-solid phase change materials (SS-PCM), an innovative heat storage material. Mortars with varying SS-PCM contents (0%, 5%, 10%, 15%) were formulated and characterized for rheological, structural, mechanical, and thermal properties. Durability assessment focused on volume stability (shrinkage), chemical stability (carbonation), and mechanical stability (over thermal cycles). Mortars with SS-PCM exhibited significant porosity and decreased mechanical strength with higher SS-PCM content. However, thermal insulation capacity increased proportionally. Notably, the material’s shrinkage resistance rose with SS-PCM content, mitigating cracking issues. Despite faster carbonation kinetics in SS-PCM mortars, attributed to high porosity, carbonation appeared to enhance long-term mechanical performance by increasing compressive strength. Additionally, SS-PCM composites demonstrated superior stability over thermal cycles compared to reference mortars.

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“…The behaviour of the building in relation to imposed deformations, thermal and rheological loads has therefore to be considered. At this purpose, different crack control procedures of the concrete floor slabs were implemented, analysing the stresses resulting from thermal loads, considering temporary construction joints to control shrinkage during construction, and providing reinforcement bands at the connection joints of the floor slabs with the concrete walls, being these areas where the higher seismic stresses are concentrated [6,7,8]. Besides, horizontal forces at the concrete walls dues to the thermal loads were considered in their analysis and reinforcement design.…”

Section: Structural Behaviour Under Horizontal Seismic and Wind Loadsmentioning

confidence: 99%

Faculty of Psycology of Málaga, Spain. Composite Steel‐concrete Structure in a Singular Building

Gómez,

Sáez,

Bernabeu

2024

ce papers

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The paper presents the design and construction of the new Faculty of Psychology in Málaga, Spain, by LLPS Architects. The project offers an interesting example of the relation between structure and architecture, based on a singular configuration of a composite steel‐concrete structure, which responds in a coherent and attractive way to the architectural configuration. The building is formed by a massive and compact three‐heights volume of 90x100 m. Two main architectural features determine the structural configuration: the interior courtyards, that measure 18x3 m., and are disposed in staggered arrangement to allow the entrance of natural light; and the cantilever of the above‐ground volume, that creates a large column‐free covered space.

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Development of the Strength of Concrete

Cited by 4 publications

References 0 publications

The Effect of Electric Arc Furnace Dust (EAFD) on Improving Characteristics of Conventional Concrete

The Effect of Electric Arc Furnace Dust (EAFD) on Improving Characteristics of Conventional Concrete

Properties and Durability of Cementitious Composites Incorporating Solid-Solid Phase Change Materials

Faculty of Psycology of Málaga, Spain. Composite Steel‐concrete Structure in a Singular Building

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