"Sandy" mortar on tuck-point repair.

Discussion in 'Bricks, Masonry and Concrete' started by drm31078, Jan 19, 2011.

  1. Jan 19, 2011 #1

    drm31078

    drm31078

    drm31078

    New Member

    Joined:
    Jan 19, 2011
    Messages:
    2
    Likes Received:
    0
    I live in Charlotte, NC and have a 4 year old home on crawlspace with a curtain wall / pillar type of foundation. I had some major foundation issues that were repaired (via helical coils) and the last step of the repair was to fix the cracks in the brick/mortar in the curtain wall.

    The brick mason came out and repaired the cracks early last month 12/7/10. He rebuilt a small section of the curtain wall (3' x 3'), but most of the work was repairing mortar cracks. The mortar cracks he ground out to about 1/2" deep and then tuck-pointed them.

    The temperatures during the day were hovering in the mid 30's and it was below freezing at night. I asked him about the cold temperatures and he didn't think it would be a problem for this type of repair. He used a small heater when working on the small section of rebuilt wall, but not when working on the mortar cracks.

    So it's been over a month since the repair was completed and I am concerned with the mortar. The mortar seems hard in that I can take a knife and push into it without causing any damage. However, if I take my finger and rub over the mortar, sand comes off (not chunks, just grains). If I rub the old mortar, no sand comes off.

    Is this normal?

    I showed the brick mason and he didn't think it was a problem since the mortar was hard and not broken. He did offered to come back in March to re-evaluate (when the weather is warmer) and fix whatever needed it.
     
  2. Jan 20, 2011 #2

    joecaption

    joecaption

    joecaption

    Well-Known Member

    Joined:
    Jan 8, 2011
    Messages:
    2,046
    Likes Received:
    295
    He really should have waited for a warmer day.
    Any morter repair will have some loose sand on it if rub, plus morter and cement take a long time to fully cure. I think that's fair of him to even offer to come back.
     
  3. Jan 20, 2011 #3

    drm31078

    drm31078

    drm31078

    New Member

    Joined:
    Jan 19, 2011
    Messages:
    2
    Likes Received:
    0
    Thanks for the reply. I thought mortar/cement cure in 28 days? The original mortar on my house doesn't rub off any sand, although it is 4 years old. What makes a repair different?
     
  4. Jan 20, 2011 #4

    itsreallyconc

    itsreallyconc

    itsreallyconc

    Well-Known Member

    Joined:
    Sep 24, 2009
    Messages:
    288
    Likes Received:
    2
    mortar's essentially concrete w/o large aggregate albeit a different type of portland,,, the repair's no different than your original BUT for the jabonie who did the work then when he should've waited for warmer weather !
     

Share This Page