• Journal of the Korea Concrete Institute
• /
• v.12 no.2
• /
• pp.43-51
• /
• 2000

This study is to investigate for the frost resistance of high-flowing concrete using finely ground granulated blast-furnace slag with experimental parameters, such as type of binder, type of superplasticizer and method of curing. The resistance to freezing and thawing of high-flowing concrete by type of binder and superplasticizer is presented differently. Though the frost resistance of high-flowing concrete is satisfactory under standard condition, it is required that high-flowing concrete has entrained air like plain concrete. Because the critical spacing factor, being capacity of frost resistance, of high-flowing concrete is longer that of plain concrete, the frost resistance of high-flowing concrete, using finely ground granulated furnace blast slag, is superior to that of plain concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1996.10a
• /
• pp.308-315
• /
• 1996

The utilization of high flowing concrete in construction sites is a world wide trend, and it will be increase to need for high flowing concrete in our construction sites. While it is quite easy to make high-flowing concrete in the laboratory, controlling slump in the field long enough to ensure easy placement once the concrete arrives at job site can be difficult. This study is the experimental study on the high-flowing and engineering properties of high flowing concrete using river sand and crushed stone according to the replacement percentage of fly-ash. As a results of this study is the mix proportion of replacement percentage of fly-ash 30% better than the others. And it is confirm to possibility of manufacture of the high flowing concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1998.10a
• /
• pp.307-312
• /
• 1998

Recently the study on high flowing concrete which has high workability and Self-compacting is being proceeded actively in the university and corporative laboratory. There are some cases that has been applied to the field. This high flowing concrete has higher fluidity and segregation resistance than Plain of flowing concrete. And it is being focused as a remarkable know-how which can make high-quality concrete and reduction effect of labor force. This properties of high flowing concrete are influenced by the relationship of several factors; binder content, water binder ratio and unit water content. It is the aim of this study to propose reference data at mix design of high flowing concrete, after comparing and analyzing the fluidity and strength properties of high flowing concrete according to water binder content ratio and unit water content.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1996.10a
• /
• pp.301-307
• /
• 1996

High flowing concrete has been made using a combination of much amount cementitious materials and addition of SP agents, so that it makes possible to high flowing properties of fresh concrete. In the fluid mechanical and rheological point of view, high flowing concrete is affected on the relation between cement paste and aggregate of volume. In this experimental study, it is measured high flowing concrete of slump-flow about 65$\pm$5cm according to 0.54~0.80 of volume ratio and to analysed the properties of high flowing concrete in fresh and hardened concrete. It is the aim of this study to consider the affection of high flowing properties accoring to cement paste to aggregate ratio of volume on the combination of concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1998.04a
• /
• pp.63-68
• /
• 1998

The fluidity of high flowing concrete can be affected by numerous parameters which characterize either the cement of the admixture. The reactivity of a cement as determined by its chemical composition(especially its $C_3$A content), its fineness and its content in sulfates and alkalies obviously plays a key role in rheology of high flowing concrete in fresh state. Specific properties of high range water reducing AE agent used to enhance the workability of high flowing concrete also exert important influence. The purpose of this experimental study is to investigate and analyze the effect of cement and high range water reducing AE agent in fluidity, setting, compressive strength of high flowing concrete. As a result, we found that fluidity of high flowing concrete is affected greatly by kind of cement and high range water reducing AE agent, also, there is harmonic character between high belite cement and polycarbonic acid high range water reducing AE agent.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1997.10a
• /
• pp.381-384
• /
• 1997

It is necessary for manufacturing the high flowing to use the fly-ash as binder of concrete, therefore, Quality of fly-ash is very important to the fluidity of high flowing concrete. In this study, it is comparing and investigating the fludity of high flowing concrete used some fly-ash which it's Ignition loss is 2.44, 4.90, 7.10%. As a result of this experimental study, Ignition loss of fly-ash effects the properties of high flowing concrete, such as air content, flowability, passability etc. but even if valve of ignition loss is upper the specification, properties of high flowing concrete such as setting and hardening time, compressive strength etc.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1997.04a
• /
• pp.220-226
• /
• 1997

High flowing concrete has flowability, passability, segregation resistance and so on, and there are so many influence factor to affect to fluidity of high flowing concrete, therefore it is so difficult to evaluate exactly the properties in fresh state. This study is to analyze and evaluate thefluidity of high flowing concrete affected by fine aggregate with test method such as, slump-flow test, V-lot test, L-flow test, Box filling test.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2008.11a
• /
• pp.497-500
• /
• 2008

This research carries out experiments for hydration exothermic rate and adiabatic temperature rise of concrete to examine the characteristics of the hydration heat of high flowing self-compacting concrete with a normal strength. As a result of the hydration exothermic rate experiment, the high flowing self-compacting concrete that used Lime stone powder and fly ash as polymers shows that its hydration heat amount reduces due to the reduction of unit cement. The result measured the adiabatic temperature rise of concrete presents that high flowing self-compacting concrete having lots of binder contents has a good performance in temperature reduction due to the effect of polymer and that triple adding high flowing self-compacting concrete has a similar temperature rise speed with conventional concrete. As a result of the research, high flowing self-compacting concrete shows a better temperature reduction performance for the binder content per unit than conventional concrete. In addition, it is judged that triple adding high flowing self-compacting concrete with a specified concrete strength 30 MPa is more beneficial in temperature reduction and early hydration heat than double adding high flowing self-compacting concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1993.10a
• /
• pp.51-56
• /
• 1993

This is a part a study on the development of High-Performance Concrete ; about experimental results from several test methods to estimate workability in fresh concrete and influences of concrete mix design that affects properties of super-flowing concrete. Super-flowing concrete can be filled in a formwork without any vibration because of its excellent workability of passing narrow space and filling complicated shaped mold, new test methods should be used to estimate the workability and rhelogy in super-flowing concrete instead of slump test method in conventional concrete.

• Proceedings of the Korea Concrete Institute Conference
• /
• 1998.10a
• /
• pp.301-306
• /
• 1998

Aggregate as the component of High Flowing Concrete has much influence on the properties of High Flowing Concrete according to the quality and condition because the aggregate occupy a lot of concrete volume. The shape and size of aggregate affect a lot spatial passibility and fillingability. The segregation is easy to occur when the rate of Fine aggregate is high so that Fluidity is much affected by aggregate factor. In this study, therefore, we try to understand the various fluidity according to the fine aggregate of standard grade rang, the size of Coarse aggregate and the rate of fine aggregate to confirm the manufacturing possibility of High Flowing Concrete by examination on the influence of fresh state of high flowing concrete such as flowability, reinforcement passibility, fillingability, segregation resistance.