FE-Study on the Effect of Gradient Concrete on Early Constraint and Crack Risk

Strieder, Emanuel; Hilber, Raimund; Stierschneider, Elisabeth; Bergmeister, Konrad

doi:10.3390/app8020246

Cited by 16 publications

(10 citation statements)

References 31 publications

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“…Concrete is widely used in modern construction projects because of its low price, simple production process, high UCS, good durability, and other characteristics [ 1 ]. Although concrete is benefiting humankind, it also brings some negative effects to the environment [ 2 ]. Cement is the main cementitious material of concrete and a lot of energy and resources are consumed in the process of cement production [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Intelligent Design of Building Materials: Development of an AI-Based Method for Cement-Slag Concrete Design

Zhu

Zhou

et al. 2022

Materials

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Cement-slag concrete has become one of the most widely used building materials considering its economical advantage and satisfying uniaxial compressive strength (UCS). In this study, an AI-based method for cement-slag concrete design was developed based on the balance of economic and mechanical properties. Firstly, the hyperparameters of random forest (RF), decision tree (DT), and support vector machine (SVM) were tuned by the beetle antennae search algorithm (BAS). The results of the model evaluation showed the RF with the best prediction effect on the UCS of concrete was selected as the objective function of UCS optimization. Afterward, the objective function of concrete cost optimization was established according to the linear relationship between concrete cost and each mixture. The obtained results showed that the weighted method can be used to construct the multi-objective optimization function of UCS and cost for cement-slag concrete, which is solved by the multi-objective beetle antennae search (MOBAS) algorithm. An optimal concrete mixture ratio can be obtained by Technique for Order Preference by Similarity to Ideal Solution. Considering the current global environment trend of “Net Carbon Zero”, the multi-objective optimization design should be proposed based on the objectives of economy-carbon emission-mechanical properties for future studies.

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Section: Introductionmentioning

confidence: 99%

Intelligent Design of Building Materials: Development of an AI-Based Method for Cement-Slag Concrete Design

Zhu

Zhou

et al. 2022

Materials

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“…Concretes with various purposes have become more popular as urban building has progressed at a fast pace. Researchers have evaluated several types of concrete that are commonly used, including heavy concrete [1], self-compacting concrete [2], gradient concrete [3], reinforced and prestressed concrete [4], and self-consolidating concrete [5]. The need for essential cement construction materials is progressively increasing.…”

Section: Introductionmentioning

confidence: 99%

A Taguchi Approach for Optimizing Design Mixture of Geopolymer Concrete Incorporating Fly Ash, Ground Granulated Blast Furnace Slag and Silica Fume

Karthik

Mohan

2021

Crystals

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In recent decades, geopolymer concrete (GPC) has been extensively researched as a potential substitute sustainable building material that may reduce CO2 emissions due to its utilization of industrial by-products. Fly ash (FA) and ground-granulated blast-furnace slag (GGBFS) are preferred geopolymer raw materials due to their obtainability and high alumina and silica concentrations. GGBFS-FA based GPC offers a clean and sustainable development technology alternative. In this study, the Taguchi method was used to optimize the mixed proportions of geopolymer concrete to achieve desired strength criteria. Four factors and four levels were considered: binder content, including four combinations of FA and GGFBS dosage, dosage of superplasticizer (0.5, 1.0, 1.5 and 2%), Na2SiO3/NaOH ratio (1.5, 2.0, 2.5 and 3), and molarity (6, 8, 10 and 12). Using these ingredients and factors, the effect of compressive strength was examined. The Taguchi approach using an L16 orthogonal array was employed to find the optimum condition of every factor while limiting the number of experiments. The findings indicated that the optimum synthesis conditions for maximum compressive strength obtained from the binder comprised 45% of FA, 45% of GGBFS and 10% of silica fume, 1.5% dosage of superplasticizer, Na2SiO3/NaOH ratio = 1.5, and 12 molar contents.

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“…components. Strieder et al (2018) constructed a simplified mass concrete structure model and found that the gradient concrete can reduce cracking risk during hardening. Kovaleva et al (2019) used the FGC shell in Rosenstein Pavilion and found that the FGC material application can reduce the weight of structural components.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

et al. 2021

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In this paper, the novel gradient concrete is innovatively applied to the bridge towers of Chizhou Yangtze River Bridge to solve the cracking and insufficient durability problems of concrete towers. Fiber-reinforced concrete is used in the outer functional area of the bridge tower, to significantly improve its crack resistance during construction and service. Moreover, the integrated design of anti-cracking and mechanical properties of tower materials is achieved. To study the performance of the novel functional gradient concrete (FGC) tower, the mechanical properties of the FGC tower material are tested, and the overall finite element stress is analyzed. Based on the material properties, the mechanical behavior of the cable-stayed bridge tower is studied. The temperature and stress of the FGC tower during the generation of the hydration heat are compared with that of the ordinary concrete tower. The crack resistance of the FGC tower is analyzed by the finite element method. The results show that the FGC tower has good mechanical properties and durability for the cable-stayed bridge towers.

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FE-Study on the Effect of Gradient Concrete on Early Constraint and Crack Risk

Cited by 16 publications

References 31 publications

Intelligent Design of Building Materials: Development of an AI-Based Method for Cement-Slag Concrete Design

Intelligent Design of Building Materials: Development of an AI-Based Method for Cement-Slag Concrete Design

A Taguchi Approach for Optimizing Design Mixture of Geopolymer Concrete Incorporating Fly Ash, Ground Granulated Blast Furnace Slag and Silica Fume

Mechanical Behavior of the Novel Gradient Concrete Tower of a Cable-Stayed Bridge

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