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Development of Water Capsules.

PB295576

Publication Date	1978
Personal Author	Schuetze, C. E.
Page Count	44
Abstract	Objective of this project was the experimental investigation of water capsule production. In a concept originated by the U.S. Bureau of Mines' Spokane Mining Research Center for a new inorganic-grout mine-bolt system, it was envisioned incorporating water-containing capsules in a fast-setting cement such that the capsules in the mix could be ruptured at the proper time by mechanical pressure and shear of the mix, and the released water would set the cement. Initial efforts of the project involved nozzle configuration and shell formulation optimization. The shell formulation developed on a prior program was modified during the course of the project to obtain the best balance of capsule breakage resistance and water retention. Subsequent effort centered on determining operating conditions that would produce the best quality capsules for each candidate shell formulation as determined by laboratory tests. Some preliminary work was done to increase the production capacity of the encapsulation equipment. The program was extended with major emphasis concerned with scale-up studies of capsule production capacity and the treatment of problems associated with grouting cartridge fabrication.
Keywords	Water Encapsulation Design criteria Laboratory equipment Polyethylene Ethylene copolymers Acrylic copolymers Breaking load Paraffin wax Alkanes Chemical composition Weight measurement Size determination Polybutenes
Source Agency	Bureau of Mines
NTIS Subject Category	99 - Chemistry
Corporate Authors	Southwest Research Inst., San Antonio, TX.; Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. (Final) Sep 77-Oct 78.
NTIS Issue Number	197918
Contract Number	H0272042

Development of Water Capsules.

Development of Water Capsules.
PB295576

Publication Date	1978
Personal Author	Schuetze, C. E.
Page Count	44
Abstract	Objective of this project was the experimental investigation of water capsule production. In a concept originated by the U.S. Bureau of Mines' Spokane Mining Research Center for a new inorganic-grout mine-bolt system, it was envisioned incorporating water-containing capsules in a fast-setting cement such that the capsules in the mix could be ruptured at the proper time by mechanical pressure and shear of the mix, and the released water would set the cement. Initial efforts of the project involved nozzle configuration and shell formulation optimization. The shell formulation developed on a prior program was modified during the course of the project to obtain the best balance of capsule breakage resistance and water retention. Subsequent effort centered on determining operating conditions that would produce the best quality capsules for each candidate shell formulation as determined by laboratory tests. Some preliminary work was done to increase the production capacity of the encapsulation equipment. The program was extended with major emphasis concerned with scale-up studies of capsule production capacity and the treatment of problems associated with grouting cartridge fabrication.
Keywords	Water Encapsulation Design criteria Laboratory equipment Polyethylene Ethylene copolymers Acrylic copolymers Breaking load Paraffin wax Alkanes Chemical composition Weight measurement Size determination Polybutenes
Source Agency	Bureau of Mines
NTIS Subject Category	99 - Chemistry
Corporate Authors	Southwest Research Inst., San Antonio, TX.; Bureau of Mines, Washington, DC.
Document Type	Technical Report
Title Note	Open file rept. (Final) Sep 77-Oct 78.
NTIS Issue Number	197918
Contract Number	H0272042