Can you lay concrete footings in the rain?

footings should be about 1.2M deep, biggest risk is them caving in if you try to do it in the wet. plus it will be a bugger to mix and the rain may wash the cement out. better to wait for it to stop raining. most get ready mix delivered as its rapid set and consistent….

Which is stronger opus caementicium or Portland cement?

Modern tests show that opus caementicium had as much compressive strength as modern Portland-cement concrete (ca. 200 kg/cm 2 [20 MPa; 2,800 psi]). However, due to the absence of reinforcement, its tensile strength was far lower than modern reinforced concrete, and its mode of application was also different:

What does the plus or minus sign mean for concrete?

The plus or minus sign is the symbol of tolerance of slump. Let say for example the slump of approved concrete design mix for your suspended slab is 150 mm +/- 25. It means that the drop of concrete after the slump cone is removed should not be more than 175 mm nor less than 125 mm. 2. Compressive strength test

Which is an example of a concrete poem?

Concrete Poem A concrete poem is a poem that is written so that the shape of the words on the page matches the subject of the poem. Sometimes, concrete poetry is called “shape” poetry.

What to use to fill gap between concrete patio and house?

This will hopefully be the fix that keeps that wall of the sunroom nice and dry. The old caulk sealant was falling apart. No backer rod or fiberboard for support. You can see from the above photos all the small holes that had developed in the old concrete crack sealant.

What kind of concrete do you use for home repairs?

All-purpose concrete can usually do the job for many DIY projects and repairs, but consider other options including high-strength concrete, crack-resistant concrete, as well as rapid-setting concrete.

What should I look for when buying concrete?

If you’re not sure what type of concrete is right for your project or how much to get, check out our Concrete Buying Guide . For jobs that require extra reinforcement, look for rebar, remesh and backer rod to give it the strength required to withstand elements and impact.

What should you wear when breaking up concrete?

Our Expert Agrees: When you’re breaking up concrete, you should always have safety glasses, gloves, and a ventilation mask. Also, it’s a good idea to wear jeans, which will protect your legs better than shorts or thinner pants. Cover the slab with plastic sheets to protect fragile items.