混凝土版需要搗實(Consolidation)嗎 (ACI Concrete International, Vol.36 No.6)

搗實關係到混凝土的強度與耐久性質.
ACI 318-11 提到必須有適當的搗實來製作具耐久性抗硫酸鹽的混凝土.
ACI 309R-05 針對不同的工程,提供搗實所需設備及步驟的建議,並提及影響搗實的配比因素,搗實的機制等.
ACI 301-10 5.3.2.5提出,除特別指定外,混凝土必須搗實, 亦允許使用振動以外的方式搗實.

搗實的程度必須與混凝土的工作性相關. 稠度較高的混凝土需要較強的振動. 自充填混凝土則不需任何振動.

所有的混凝土需要適當程度的搗實, 方法與設備必須於施工規範中要求.

(Draft) ACI 新委員會 310-0J - Polished Finishes 成立

Ref:
http://www.concrete.org/committees/DirectoryofCommittees/ACommitteeHome.aspx?committee_code=0000310-0J

(Draft) 中型與重型卡車將適用新能源效率法規 (美國)

Ref:
http://www.businessweek.com/news/2014-02-18/obama-sets-timetable-for-new-truck-fuel-efficiency-rules

(Draft) 連續澆置混凝土的世界記錄

Ref:
http://www.foxnews.com/us/2014/02/16/la-construction-crews-aim-for-longest-continuous-concrete-pour/

約2000車次, 連續20 小時澆置21200 立方碼的混凝土

(Draft) 綠建築的新概念: Net positive + water

Ref:
http://www.greenbiz.com/blog/2014/02/12/net-positive-add-water-buildings

(Draft) 549.4R-13 Guide to Design and Construction of Externally Bonded Fabric-Reinforced Cementitious Matrix (FRCM) Systems for Repair and Strengthening Concrete and Masonry Structures

Ref:
http://www.concrete.org/Store/ProductDetail.aspx?ItemID=549413

(Draft) GT 利用爐石研發自癒混凝土

Ref:
http://www.bizjournals.com/atlanta/blog/atlantech/2014/02/gt-researchers-develop-self-healing.html