ULTRA-LIGHTWEIGHT CEMENT

Sabins, Fred

Cementing Solutions, Inc. (United States)

关键词: Cements;    Measuring Methods;    Hydroxides;    Weight;    36 Materials Science;   

DOI  :  10.2172/821600
RP-ID  :  NONE
RP-ID  :  FC26-00NT40919
RP-ID  :  821600

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this project is to develop an improved ultra-lightweight cement using ultra-lightweight hollow glass spheres (ULHS). This report discusses testing that was performed for analyzing the alkali-silica reactivity of ULHS in cement slurries. Laboratory testing during the eleventh quarter focused on evaluation of the alkali-silica reaction of eight different cement compositions, four of which contain ULHS. This report provides a progress summary of ASR testing. The original laboratory procedure for measuring set cement expansion resulted in unacceptable erosion of the test specimens. In subsequent tests, a different expansion procedure was implemented and an alternate curing method for cements formulated with TXI Lightweight cement was employed to prevent sample failure caused by thermal shock. The results obtained with the modified procedure showed improvement over data obtained with the original procedure, but data for some compositions were still questionable. Additional modification of test procedures for compositions containing TXI Lightweight cement were implemented and testing is ongoing.