Effectiveness of Steam Treating Method on Inhibiting the Expansive Problem of Concrete with Slag as Aggregate

2013 ◽  
Vol 723 ◽  
pp. 609-616
Author(s):  
Wei Chien Wang ◽  
Chih Chien Liu ◽  
Chau Lee
Keyword(s):  
Magnesium Oxide ◽  
Calcium Oxide ◽  
Steel Industry ◽  
Volume Expansion ◽  
Steam Treatment ◽  
Free Calcium ◽  
Concrete Aggregate ◽  
Furnace Slag ◽  
By Products

The furnace slag are the by-products of the steel industry, the main ingredients are the oxide of calcium, alumina and magnesium, and some silica. Slag used as concrete aggregate could cause the problem of the volume expansion of concrete. The expansion problem may be produced by ASR or free calcium oxide and magnesium oxide in slag. This research stabilizing the non-ASR reactive slag using steam treatment analyzes the effectiveness of steam treating technique inhibiting the expansive problem for slag used in concrete. And this paper also discusses the effect of the steam treating time on the performance of inhibiting the expansive problem.

scholarly journals Study on the possibilities of treatment of combustion by-products from fluidized bed boilers into a product devoid of free calcium oxide

2015 ◽  
Vol 14 (4) ◽  
pp. 164-172 ◽  
Author(s):  
Jacek M. Łączny ◽  
Sebastian Iwaszenko ◽  
Krzysztof Gogola ◽  
Andrzej Bajerski ◽  
Tomasz Janoszek ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Calcium Oxide ◽  
Free Calcium ◽  
Fluidized Bed Boilers ◽  
By Products

scholarly journals Study on the possibilities of treatment of combustion by-products from fluidized bed boilers into a product devoid of free calcium oxide

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Jacek M. Łączny ◽  
Sebastian Iwaszenko ◽  
Krzysztof Gogola ◽  
Andrzej Bajerski ◽  
Tomasz Janoszek ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Calcium Oxide ◽  
Free Calcium ◽  
Fluidized Bed Boilers ◽  
By Products

Improving the Volume Stability of Steel Slag for Construction and Building Materials

2014 ◽  
Vol 936 ◽  
pp. 1399-1403 ◽  
Author(s):  
Peng Guan Li ◽  
Feng Qing Zhao ◽  
Zhao Ma
Keyword(s):  
Chemical Modification ◽  
Solid Waste ◽  
Magnesium Oxide ◽  
Calcium Oxide ◽  
Stability Problem ◽  
Building Materials ◽  
Steel Slag ◽  
Free Calcium ◽  
Volume Stability ◽  
Combined Use

Steel slag is a solid waste produced in the process of steelmaking, and applying it to the field of building materials is the main utilization approach at present. However, steel slag contains free calcium oxide and magnesium oxide, existing serious stability problem. The purpose of this work is to discuss the approaches to solve volume stability problem of steel slag through mechanical modification, chemical modification and other methods. Two successful cases we completed recently were presented to illustrate the combined use of several modifying methods for volume stability treatment of steel slag.

scholarly journals Arsenic Removal from Water Using Industrial By-Products

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Branislava M. Lekić ◽  
Dana D. Marković ◽  
Vladana N. Rajaković-Ognjanović ◽  
Aleksandar R. Đukić ◽  
Ljubinka V. Rajaković
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Arsenic Removal ◽  
Fixed Bed ◽  
Steel Production ◽  
Groundwater Treatment ◽  
Maximum Sorption Capacity ◽  
Column Adsorption ◽  
Furnace Slag ◽  
By Products

In this study, removal of arsenic ions using two industrial by-products as adsorbents is represented. Removal of As(III) and As(V) from water was carried out with industrial by-products: residual from the groundwater treatment process, iron-manganese oxide coated sand (IMOCS), and blast furnace slag from steel production (BFS), both inexpensive and locally available. In addition, the BFS was modified in order to minimise its deteriorating impact on the initial water quality. Kinetic and equilibrium studies were carried out using batch and fixed-bed column adsorption techniques under the conditions that are likely to occur in real water treatment systems. To evaluate the application for real groundwater treatment, the capacities of the selected materials were further compared to those exhibited by commercial sorbents, which were examined under the same experimental conditions. IMOCS was found to be a good and inexpensive sorbent for arsenic, while BFS and modified slag showed the highest affinity towards arsenic. All examined waste materials exhibited better sorption performances for As(V). The maximum sorption capacity in the batch reactor was obtained for blast furnace slag, 4040 μgAs(V)/g.

Sign in / Sign up

Export Citation Format

Share Document