Drying Shrinkage of SCC – Influence of the Composition of Ternary Composite Cements

Vikan, Hedda; Hammer, Tor Arne; Kjellsen, Knut O.

doi:10.1007/978-90-481-9664-7_23

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…Higher drying (free) shrinkage of SCC is expected due to the denser matrix of the system, which leads to small capillary voids and allows faster removal of water than large voids [18]. Additionally, using finer cement leads to higher drying shrinkage due to the pore refinement [19]. On the other hand, using fly ash and GGBFS reduces the drying shrinkage of SCC, while the silica fume increases the drying shrinkage when used in binary blends [20,21].…”

Section: Drying Shrinkage Modelsmentioning

confidence: 99%

Evaluating Prediction Models of Creep and Drying Shrinkage of Self-Consolidating Concrete Containing Supplementary Cementitious Materials/Fillers

Asaad¹,

Morcous²

2021

Applied Sciences

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Supplementary cementitious materials (SCMs) and fillers play an important role in enhancing the mechanical properties and durability of concrete. SCMs and fillers are commonly used in self-consolidating concrete (SCC) mixtures to also enhance their rheological properties. However, these additives could have significant effects on the viscoelastic properties of concrete. Existing models for predicting creep and drying shrinkage of concrete do not consider the effect of SCM/filler on the predicted values. This study evaluates existing creep and drying shrinkage models, including AASHTO LRFD, ACI209, CEB-FIP MC90-99, B3, and GL2000, for SCC mixtures with different SCMs/fillers. Forty SCC mixtures were proportioned for different cast-in-place bridge components and tested for drying shrinkage. A set of eight SCC mixtures with the highest paste content was tested for creep. Shrinkage and creep test results indicated that AASHTO LRFD provides better creep prediction than the other models for SCC with different SCMs/fillers. Although all models underestimate drying shrinkage of SCC with different SCMs/fillers, the GL2000, CEB-FIP MC90-99, and ACI 209 models provide better prediction than AASHTO LRFD and B3 models. Additionally, SCC mixtures with limestone powder filler exhibited the highest creep, while those with class C fly ash exhibited the highest drying shrinkage.

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Section: Drying Shrinkage Modelsmentioning

confidence: 99%

Evaluating Prediction Models of Creep and Drying Shrinkage of Self-Consolidating Concrete Containing Supplementary Cementitious Materials/Fillers

Asaad¹,

Morcous²

2021

Applied Sciences

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“…(2010), investigated the influence of composition of different cements on drying shrinkage of SCC using a relatively high water to cementitious ratio (w/cm=0.55). It was confirmed that shrinkage was increased with increased cement fineness and early reactivity (Vikan, Hammer, & Kjellsen, 2010).…”

Section: Creep and Shrinkagementioning

confidence: 87%

“…According to the results, SCC samples produced the same or less drying shrinkage strains compared to the conventional concrete samples (Schindler, Barnes, Roberts, & Rodriguez, 2007). Vikan et. al.…”

Section: Creep and Shrinkagementioning

confidence: 99%

A study of self consolidating concrete for cast in place applications: Current practices, rapid wcm determination, and stability effects of pumping

Hershberger¹

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Self-Consolidating Concrete (SCC) is a relatively new type of concrete mixture that does not require external compaction during placement. Compared to traditional vibrated concrete (TVC), SCC is much more fluid, which gives it the ability to flow and fill formwork without the need for any external compaction efforts. Although the increased cement content and chemical admixtures found in SCC typically results in a higher material cost, the potential for cost savings in reduced construction time and labor are significant. The potential of this relatively new type of concrete have yet to be realized due to a lack of regulation and full understanding of its material behavior which radically differs from traditional concrete mixes. This thesis outlines a research study performed on SCC for cast-in-place (CIP) applications, which includes a comprehensive literature review, the current practices and regulations of 25 state agencies, as well as experimental findings related rapid fresh water-to-cement ratio determination and the effects of pumping SCC on segregation resistance and air-void properties. Due to SCC's relatively high sensitivity to changes in water content, the development of on-site quality control measures to determine the fresh w/cm could be beneficial to the implementation of SCC for CIP applications. The Standard Test Method for Water Content of Freshly Mixed Concrete Using Microwave Oven Drying (AASHTO T318-02) was evaluated for potential use as an on-site quality control measure in the determination of fresh w/cm. Two testing procedures were investigated using AASHTO T318-02 which included the use of concrete samples and sieved mortar sample. Both methods predicted the w/cm for delivered concrete and laboratory batched SCC within reasonable accuracy. The average difference (taken as calculated w/cm minus the actual w/cm ratio) for concrete and sieved mortar samples were found to be 0.012 and 0.013, respectively. The relatively low viscosity of SCC allows for the use of innovative construction methods such as pumping from various locations on the formwork. A previous research project at West Virginia University performed in 2010 proved that SCC could be pumped from the bottom of the formwork with the casting of a 12-feet SCC column. Due to the low viscosity of SCC, some researchers have suggested that the stability of the air void structure as well as the segregation resistance may be lower than traditional mixes. Adequate segregation resistance and air-void structure within a concrete structure is necessary to ensure acceptable material behavior. An image analysis was performed to evaluate the segregation resistance and air-void structure of the pumped SCC. Five concrete samples were cored along the height of the hardened SCC column. The hardened aggregate analysis showed that the pumped SCC exhibited segregation behavior at various locations within the column. Of the specimens analyzed, half did not meet the ASTM C457 recommended value for specific surface to resist moderate freeze-thaw cycling while...

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Creep and Shrinkage of SCC

Leemann

Lura

2014

Mechanical Properties of Self-Compacting Concrete

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Drying Shrinkage of SCC – Influence of the Composition of Ternary Composite Cements

Cited by 3 publications

References 3 publications

Evaluating Prediction Models of Creep and Drying Shrinkage of Self-Consolidating Concrete Containing Supplementary Cementitious Materials/Fillers

Evaluating Prediction Models of Creep and Drying Shrinkage of Self-Consolidating Concrete Containing Supplementary Cementitious Materials/Fillers

A study of self consolidating concrete for cast in place applications: Current practices, rapid wcm determination, and stability effects of pumping

Creep and Shrinkage of SCC

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