Development of Non-Chloride Concrete Setting Accelerator and the Study of its Application to Concrete Derived from Industrial Byproducts
| Project/Area Number |
15560501
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Building structures/materials
|
|---|
| Research Institution | Nihon University |
|---|
Principal Investigator |
UMEMURA Yasuhiro Nihon University, College of Science and Technology, Associate Professor, 理工学部, 助教授 (70246825)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
TSUYUKI Naomitsu Nihon University, College of Science and Technology, Professor, 理工学部, 教授 (20059611)
KOIZUMI Koushiro Nihon University, College of Science and Technology, Assistant, 理工学部, 助手 (10312042)
|
|---|
| Project Period (FY) |
2003 – 2004
|
| Project Status |
Completed (Fiscal Year 2004)
|
| Budget Amount *help |
¥3,800,000 (Direct Cost: ¥3,800,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥3,000,000 (Direct Cost: ¥3,000,000)
|
|---|
| Keywords | setting accelerator / superplasticizer / viscosity agent / admixture / blast-furnace slag / fly-ash / high-flow concrete / 混和剤 / 鉄鋼スラグ |
|---|
| Research Abstract |
In high-performance concrete, a delay in setting may result with the addition of large amounts of superplasticizer, viscosity agent, and other admixtures. To solve this problem, a setting accelerator is used, which traditionally used to be calcium chloride (CaCl_2). However, calcium chloride is not used currently because it leads to corrosion of steel reinforcements. In the present study, we have developed non-chloride compound setting accelerator, in which aluminum sulfate (Al_2(SO_4)_3) and barium nitrate (Ba(NO_3)_2) are the main components instead of calcium chloride. The effects of these additives on setting property, flow property, and compressive strength were investigated when industrial byproducts such as fly-ash and blast-furnace slag were used in the high-flow concrete. The setting time was found to be shortened by about 30-40% while maintaining a similar flow property to concrete without a setting accelerator. The performance was increased by about 15% compared with that of the calcium nitrite accelerator which is presently used.
|
Report
(3 results)
Research Products
(29 results)
