Discussion. Failure of a Prestressed Concrete Reservoir.

Neville, Adam; Manning, G P; Nhatia, H S; Mackey, R D; Kirk, D Pearson; Ramakrishnan, Pooja

doi:10.1680/iicep.1967.8481

Cited by 13 publications

(17 citation statements)

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“…Two types of cementitous binders were used: Type III high-early strength portland cement and Class C fly ash [24]. Given the functionality of fly ash depends upon its chemical composition, a refined material test was conducted.…”

Section: Methodsmentioning

confidence: 99%

Permeable concrete mixed with various admixtures

2016

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Section: Methodsmentioning

confidence: 99%

Permeable concrete mixed with various admixtures

2016

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“…Therefore, the aggregates play an inhibitory role in the creep process of concrete, and the higher the aggregate content, the less the creep. In contrast, the higher the paste content in concrete, the greater the creep 45 …”

Section: Factors Influencing Tensile Creepmentioning

confidence: 97%

Modeling blended cement concrete tensile creep for standard ring test application

Zhang

Afroz

Nguyen

et al. 2022

Structural Concrete

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The tensile creep of concrete with supplementary cementitious materials (SCMs) such as fly ash (FA) and ground granulated blast furnace slag (GGBFS) is investigated in this paper. A total of 21 series of tensile creep tests using dog‐bone specimens under uniaxial tensile loading have been carried out. The cement replacement rates considered were 30% fly ash, 40% and 60% GGBFS. The characteristic compressive strength of concrete was ranging from 25 to 100 MPa. The tests were conducted from the age of 2 days until 28 days. It is observed that the tensile creep of fly ash concretes was slightly lower than that of the reference mixtures without SCM. For GGBFS concrete, the higher the GGBFS content, the higher the tensile creep. Existing creep models, originally developed for creep in compression, could not predict the experimental tensile creep results. Thus, a new tensile creep model was proposed including creep prediction for concrete with fly ash and GGBFS. The new model was calibrated only for controlled environmental conditions (23°C and 50% RH) and has been validated by analyzing the development of concrete tensile stress in the restrained ring test.

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“…Larger aggregates have less surface area to be wetted per unit mass and when the water-cement ratio is kept constant, more water will be available in the mix to increase workability and thereby increasing the slump values of the concrete mix. Consequently, larger aggregates will require less water to achieve high strength [15]. Therefore, it can be stated that slump values are indicators of compressive strengths of hardened concrete.…”

Section: Slumpmentioning

confidence: 99%

“…The results of densities of concrete produced using both angular and rounded coarse aggregates fall within the range of normal weight concrete as shown in Table 5. Concretes with densities ranging from 2200 to 2600kg/m 3 are classified as normal weight concrete and are suitable for the production of reinforced concrete member [15]. Quality concretes are produced to satisfy compressive strength and durability criteria.…”

Section: Densitymentioning

confidence: 99%

Influence of Aggregate Size and Shape on the Compressive Strength of Concrete

Konitufe

Abubakar

Baba³

2023

Constr.

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This paper investigates the effect of the size and shape of coarse aggregates on the compressive strength of concrete. Concrete strength is aﬀected by the surface texture, grading and maximum aggregate size. Six different sizes of coarse aggregate have been selected for both angular and rounded coarse aggregate. The coarse aggregates were used in the production of concrete and tested for workability, density and compressive strength. The specimen was cured for 3, 7, 14, 21 and 28 days by full water immersion. The results indicated that under the same curing conditions and water-cement ratio, the compressive strength of concrete produced with both angular and rounded aggregates increased with increasing aggregate size, up to an aggregate size of 14 mm. The optimum compressive strength of 27.58 N/mm2 and 25.88 N/mm2 were achieved at 28 days curing and 14 mm aggregate size for concrete with angular and rounded aggregates respectively. Coarse aggregates with angular shape result in concretes with better compressive strength than coarse aggregates with a rounded shape. The model equation developed to predict the compressive strength of rounded aggregate has R2 value of 95.66%, and the higher the value of R2, the better the model fits the data.

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Discussion. Failure of a Prestressed Concrete Reservoir.

Cited by 13 publications

References 0 publications

Permeable concrete mixed with various admixtures

Permeable concrete mixed with various admixtures

Modeling blended cement concrete tensile creep for standard ring test application

Influence of Aggregate Size and Shape on the Compressive Strength of Concrete

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