Study on the Properties of Roller Compacted Concrete in the Dam of Jinghong Hydropower Station

Xie, Jian Bin; He, Tian Chun; Fan, Jing; Ai, Yong Ping

doi:10.4028/www.scientific.net/amm.90-93.2541

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…The frost resistance grade of the internal concrete is F50~F100, which is similar to the project in central Tibet. The mix ratio of Gansu Longshou and Xinjiang Kalasuke RCC [8] are shown in Table 3. After analysis and comparison, the multi-year average temperature and extreme minimum temperature in central Tibet are higher than those of Longshou and Kalasuk, while the RCC dams of Gansu Longshou and Xinjiang Kalasuk have been in normal operation for many years, indicating that RCC dam construction technology is feasible in cold regions.…”

Section: Adaptability Of Materials Propertiesmentioning

confidence: 99%

Feasibility study on construction of RCC gravity dam under special climatic conditions in Tibet

Wang

Zhong

et al. 2023

MATEC Web Conf.

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According to the experience in the construction of water conservancy and hydropower projects in the Mainland, RCC dam construction has two main advantages: the rapid construction speed of roller compacted concrete can realize early power generation, and the price of fly ash is much lower than that of cement, which can reduce the project cost. Tibet has special geographical environment and climatic conditions, and generally has the characteristics of “high altitude, low pressure, low temperature, large temperature difference between day and night, and dry climate”. Taking the dam-building environment in central Tibet as an example, through investigation and research and analogy of similar projects, this paper analyzes the adaptability of construction of RCC gravity dams in Tibet from the aspects of geographical environment, climatic conditions, material properties, construction progress, and project cost. Adaptability to high altitudes. It provides a reference for choosing a safe, reliable, economical and reasonable dam type in the construction of water conservancy and hydropower projects. It provides reference for selecting safe, reliable, economical and reasonable dam types in water conservancy and hydropower engineering construction.

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Section: Adaptability Of Materials Propertiesmentioning

confidence: 99%

Feasibility study on construction of RCC gravity dam under special climatic conditions in Tibet

Wang

Zhong

et al. 2023

MATEC Web Conf.

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“…As an alternative to carrying out mechanical experiments on large specimens, the well-known wet-screening method is commonly employed in practice [8]. Following this method, experimental testing is performed on standard specimens, which are cast using the wet-screened concrete obtained by removing the coarse aggregates with the size larger than 40 mm from the original fully graded concrete through sieving, enabling the testing under usual laboratory conditions.…”

Section: Introductionmentioning

confidence: 99%

Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

Jin

Jing

et al. 2018

Advances in Materials Science and Engineering

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e widely used wet-screening method in the experimental testing of hydraulic fully graded concrete inevitably results in a gap between the real mechanical parameters of hydraulic fully graded concrete specimens and those of the corresponding wet-screened specimens and therefore necessitates the comparative study on their mechanical behaviors. To this end, a two-dimensional mesoscale modeling methodology is developed for simulating the tensile fracturing behaviors of hydraulic fully graded and wet-screened concretes, and extensive Monte Carlo simulations are performed. e individual effects of specimen size variation, variation of gradation and volume fraction of coarse aggregates, and the weaker interfacial transition zones surrounding the large coarse aggregates to be removed by wetscreening are detailed followed by the discussion on the combined effect of these three main factors. All the mean values of the macroscopic mechanical parameters related to tensile fracturing behaviors are found to show significant change in response to wetscreening, and the underlying differentiation mechanism and governing factor(s) are identified. Furthermore, it is shown that the randomness of the investigated parameters can be roughly described by the Gaussian distribution, and the dispersion of each of the investigated parameters of hydraulic fully graded concrete is higher than that of the corresponding wet-screened concrete.

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The<i> In Situ</i> Shear Strength of Roller Compacted Concrete in the Dam of Jinghong Hydropower Station

Xie

Fan

et al. 2012

AMR

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For roller compacted concrete with the admixtures of grinding limestone powder and water quenched iron slag powder (shortly called double admixture RCC) in dam of Jinghong Hydropower station, the raw materials and the mix proportion of the RCC were studied. Then one experiment on in situ shear strength are carried out between hot rise layer and cold rise layer at the altitude of 573.3 meters of RCC in dam block 23 based on the flat push-situ shear test program. The shear strength indexes of hot rise layer and cold rise layer in RCC for Jinghong Hydropower Station are tested by the experiment subsequently. The study results show that the index for interlayer shear strength of the cold rise layer of RCC with 90 days ages in dam are the friction coefficient of 1.12, and the cohesion of 1.22 MPa. The index for interlayer shear strength of the hot rise layer of RCC with 90 days ages in dam are the friction coefficient of 1.32, and the cohesion of 1.24 MPa. The study results also show that the construction processes meet the requirements of the RCC construction and the integrity of hot rise layer of RCC in the dam is better.

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Study on the Properties of Roller Compacted Concrete in the Dam of Jinghong Hydropower Station

Cited by 3 publications

References 1 publication

Feasibility study on construction of RCC gravity dam under special climatic conditions in Tibet

Feasibility study on construction of RCC gravity dam under special climatic conditions in Tibet

Comparisons of Tensile Fracturing Behaviors of Hydraulic Fully Graded and Wet‐Screened Concretes: A Mesoscale Study

The<i> In Situ</i> Shear Strength of Roller Compacted Concrete in the Dam of Jinghong Hydropower Station

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