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<blockquote data-quote="CHASMAN9" data-source="post: 632680" data-attributes="member: 307"><p>Agreed, I've got over 36 years in building experience with everything from a custom single story Dog run to a $21m 2600 Highland rd condo's and want to understand what I have been doing wrong all this time? A concrete block has a much higher chance of freezing and cracking due to it's porous nature whereas a well poured monolithic slab will not have the same properties. Type S mortar has a psi of approximately 1500 and the block has a 1900 psi breaking strength whereas concrete has a 3000-3500 psi breaking strength and cures all at the same rate. Now if you introduce Calcium into the mix, it will harden faster in cold weather but also has a higher chance of cracking. To help alleviate that, you can add fibermesh which is fiberglass strands that are added into the mix to help strengthen the slab after it has been cured. I could be wrong on this, but possibly not. <img src="/styles/default/xenforo/smilies2/dunno.gif" class="smilie" loading="lazy" alt=":dunno:" title="Dunno :dunno:" data-shortname=":dunno:" /></p></blockquote><p></p>
[QUOTE="CHASMAN9, post: 632680, member: 307"] Agreed, I've got over 36 years in building experience with everything from a custom single story Dog run to a $21m 2600 Highland rd condo's and want to understand what I have been doing wrong all this time? A concrete block has a much higher chance of freezing and cracking due to it's porous nature whereas a well poured monolithic slab will not have the same properties. Type S mortar has a psi of approximately 1500 and the block has a 1900 psi breaking strength whereas concrete has a 3000-3500 psi breaking strength and cures all at the same rate. Now if you introduce Calcium into the mix, it will harden faster in cold weather but also has a higher chance of cracking. To help alleviate that, you can add fibermesh which is fiberglass strands that are added into the mix to help strengthen the slab after it has been cured. I could be wrong on this, but possibly not. :dunno: [/QUOTE]
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