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DRY PACK SPECIFICATION[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: DRY PACK SPECIFICATION
- From: "±è¾ç¼ö" <kimslove(--nospam--at)ns.kopec.co.kr>
- Date: Tue, 23 Feb 1999 16:58:13 +0900
Dear all I'm looking for dry pack specification and field strength test results. In our project (Nuclear Power Plant Construction In Korea), dry pack used for repair of concrete such as holes left by the removal of fasteners from the ends of form tie rods, narrow slots cut for repair of creaks, and drilled hole for anchor bolts but not used. In a construction specification states as follows; 1. Mixing : Drypack mortar shall be mixed as stiff as practical using not more than 1 part cement to 2-1/2 parts of sand by damp loose volume. The sand shall be graded so that 100 percent will pass the No. 16 sieve. Sufficient water shall be used to produce a mortar, which will stick together when molded into a ball by squeezing gently in the hands and will not exude water but will leave the hands damp. 2. Minimum Compressive Strength : 5,000 psi at 28 days 3. Expansion : No Expansion 4. Shrinkage : Not more than 1% 5. Bleeding : No visible bleeding The field test results of drypack strength that mixed as shown on above was about 3,500psi, so didn't meet strength requirement. Contractor complains that they could not make drypack grout which meet the above strength requirement. I'd like to ask for following question; 1. Standard specification for drypack ? 2. Min, strength of drypack? 3. Anyone who has a experience of drypack strength test ? Test results? 4. Can I use drypack for above described purpose (crack repair, remaining anchor bolts hole)? (Structure design concrete strength is 4,500 to 5000psi.) Regards, Yangsoo KIM, PE KOREA POWER ENGINERING COMPSNY, INC.
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