Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

RE: Slab floor damage

[Subject Prev][Subject Next][Thread Prev][Thread Next]

I’m not sure I understand.  Are you saying that after concrete has cured (40 years) that it will expand then shrink after exposure to water?  I thought that curling only happened after the initial cure.



Joseph R. Grill, P.E. (Structural)

Shephard - Wesnitzer, Inc.

Civil Engineering and Surveying


-----Original Message-----
From: Stuart, Matthew [mailto:mstuart(--nospam--at)]
Sent: Thursday, June 22, 2006 1:15 PM
To: seaint(--nospam--at)
Subject: RE: Slab floor damage


Water has more than likely migrated under slab…and with top surface of slab exposed to conditioned space curling of the slab can occur (top surface is dryer than recently wet bottom and therefore shrinks relative to bottom causing curling of slab).


As water/moisture under slab recedes and subgrade dries out, curling will dissipate.


D. Matthew Stuart, P.E., S.E., F.ASCE, SECB

Senior Project Manager

Structural Department


Schoor DePalma Engineers and Consultants

200 State Highway Nine

Manalapan, NJ 07726

732-577-9000 (Ext. 1283)

908-309-8657 (Cell)

732-298-9441 (Fax)



-----Original Message-----
From: ENGRLAINES(--nospam--at) [mailto:ENGRLAINES(--nospam--at)]
Sent: Thursday, June 22, 2006 4:06 PM
To: seaint(--nospam--at)
Subject: Slab floor damage


40-year old single story house w/ 4" slab-on-grade foundation/floor, most likely cut and fill pad, water seepage in nearby street but not under house, trees in side yards. Floor tiles cracked (tight cracks) and buckled approximately 1-inch high near the edge of the floor (but not at the edge) in a 5-foot line perpendicular to cut/fill line and to base of slope. No damage to plaster walls, ceilings. Moderate temperatures (Los Angeles). No recent shaking (construction, earthquakes). Wha’s up?

Charles Laine, S.E.

Long Beach, CA