检索结果-南通市图书馆

Green Cementitious Paste Based on Recycled Materials

Journal of Physical Science and Application 2016年第1期6卷 151-156页

作者： Saad B. H. Farid Department of Materials Engineering University of Technology Baghdad Iraq

Cementitious alkali activated aluminosilicates pastes were produced from recycled and locally obtainable materials in Iraq. The compositions were based on recycled bricks, water glass, commercial caustic soda flakes, and nano silica. The nano silica was prepared from the abundant local ＂Iraqi anber＂ rice husks and added to the prepared pastes in different weight percentages. Another set of pastes was prepared via adding 5w% of＂A1-Najaf＇ fly ash.at the expense of the recycled bricks powders. The pastes were cured for 1-28 days under ambient conditions. The compressive strengths for the cured pastes were measured. In addition, the cured pastes were characterized via X-ray diffraction, FTIR, and optical microscopy. The addition of the nano silica and longer curing times improve the microstructure packing and thus increases the compressive strengths. The added fly ash.impregnates the microstructure with extra gel phase and further improves the compressive strengths of the cured pastes.

关键词： Alkali activation aluminosilicates recycled materials nono silica fly ash.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CONSIDERATIONS WHEN SPECIFYING LITHIUM ADMIXTURES TO MITIGATE THE RISK OF ASR

CONSIDERATIONS WHEN SPECIFYING LITHIUM ADMIXTURES TO MITIGAT...

引用

第十二届国际混凝土碱集料反应会议

作者： Rebecca L Hooper Philip J Nixon Michael D A Thomas Scott Wilson Pavement Engineering 9/10 Faraday BuildingNottingham Science and Technology ParkUniversity BoulevardNottinghamNG7 2QPUK. Building Research Establishment Garston WatfordWD25 9XXUK. Department of Civil Engineering Head HallUniversity of New BrunswickFrederictonNBE3B 5A3Canada.

＜正＞ Based on research conducted at the Building Research Establishment （BRE） and work from across the globe, theUK has established recommended addition levels of lithium admixtures as one method to minimize the risk ofdeleterious alkali-silica reaction （ASR）.These addition levels allow increases in the permitted alkali content of concrete mixtures beyond that previouslyrecommended in the UK, and allow for combinations of lithium admixtures with pulverized-fuel ash.（pfa） alsoknown as fly ash. a supplementary cementitious material or Type Ⅱ*** the impossibility of testing every lithium admixture addition level in combination with every alkali contentconcrete mixture, the recommendations are based on a pragmatic approach to safe specification. Thisspecification process includes interpolation of threshold levels and determination of an appropriate margin ofsafety based on concrete batching practices in the UK and embodied in European *** paper provides an overview of the use of lithium salts to mitigate deleterious ASR and provides furtherresearch evidence to validate the findings of previous authors. The paper explains the research basis for the UKrecommendations and describes the approach to the safe specification of lithium admixtures. Theserecommendations were published in BRE Information paper IP 1/02, and are now included in the 2004 edition ofBRE Digest 330, and referenced in the British Standard, BS 8500.

关键词： Lithium Specification Pulverized-fuel ash fly ash.

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Durability of Seawater Mixed Concrete with Different Replacement Ratio of BFS （Blast Furnace Slag） and FA （fly ash.

引用

Journal of Civil Engineering and Architecture 2016年第5期10卷 568-580页

作者： Nobuaki Otsuki Aung Kyaw Min Tomohiro Nagata Cheng Yi Department of International Development Engineering Tokyo Institute of Technology Tokyo 152-8552 Japan Civil Engineering Unit Chiyoda Corporation Yokohama 230-0077 Japan

Using seawater in concrete can be considered as one of the sustainable approaches in construction industry not only to save the freshwater resource but also to promote the use of abandoned seawater resource, especially in the construction at the uninhabited area close to the sea where the procurement of fresh water is difficult. In this study, durability against chloride attack of seawater mixed concrete with different replacement ratio of BFS （blast furnace slag） and FA （fly ash. is discussed and the life time until the occurrence of corrosion crack is evaluated. The results show that：（1） Chloride penetration rate of seawater mixed specimens with BFS and FA is lower than that of freshwater mixed OPC （ordinary Portland cement） specimens; （2） Oxygen permeability of seawater mixed specimens with BFS and FA is almost the same or lower than that of freshwater mixed OPC specimens; （3） Total life time （corrosion incubation period and propagation period） of seawater mixed specimens with BFS and FA is almost the same or only slightly shorter than that of freshwater mixed OPC specimens. From the results, it was confirmed that the usage of seawater in concrete mixing is feasible in concrete with the appropriate BFS and FA replacement ratio.

关键词： Seawater chloride attack corrosion durability of concrete blast furnace slag fly ash.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：