Questions tagged [cement]

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3answers
184 views

Cracks on second-story cement slab

I just purchased a 50-year-old condo. I pulled up the carpet and found the second floor to be a concrete slab. There are thin cracks in areas and a small pit in one area. What are my options for ...
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4answers
148 views

Can I create concrete driveway with forms to get the paver stone look without the need for all the aggregate beneath?

We are in desperate need of repaving our backyard that serves as a parking lot in addition to redoing our driveway. After weighing the pros and cons and taking in aesthetics we are interested in doing ...
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2answers
128 views

Using just cement to plug a narrow channel/hole

I know that ideal thing is to use concrete, a mix of cement and aggregate (usually sand and gravel/rocks. However I have a bag of cement that's not going to go to any use, and my aim is just to cover ...
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1answer
63 views

Fixing void on face of concrete steps

My front steps are crumbling on the top. I wondered what I could do to fix this? Thanks in advance all!
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2answers
41 views

Need cement etching on inside floor?

I have a cement slab that had a plastic film and then pergo flooring. Removing this floor. Right now, I just want to seal cement and epoxy paint once I get all pergo removed. First, since I am only ...
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1answer
797 views

How to repair garage slab after plumbing brought in

The corner of the slab in my garage was removed to bring in plumbing. It's been backfilled with ~3 feet of dirt (slab was 2ft thick). What is the best way to repair this? I'm thinking I'll dig out ...
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1answer
54 views

How to dislodge bluestones sitting in cement? (Pictures)

I need to move this wall, but I want to reuse the bluestone for the new wall. So they need to stay whole. Luckily, there isn't any cement between the bluestones- they're just sitting in it. Has ...
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1answer
35 views

What should I look for in a diamond blade?

I'm considering a 7" diamond blade for a circular saw, to be used to cut cement type pavers and short runs of concrete (driveway/sidewalk). Some blade designs are segmented/slotted, some not. Prices ...
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1answer
837 views

Filling gaps between water pipes and floor/wall - what material to use?

In my bathroom, the water supply and drain for the wash basin are exposed. The 3 pipes run along the wall at floor level, like this: There's a small gap (a few mm) between the drain pipe and ...
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2answers
4k views

How to make white portland cement stronger?

We are trying to make white pavers for crosswalks versus painting. In 2013 we made some that are still in fair shape, did not write down what we used as a formula. I think it was 3 to 1, one part ...
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1answer
2k views

Can I use EP 80W/90 oil instead of EP90 oil in a Belle MiniMix 150 gearbox?

I have a Belle MiniMix 150 110V Electric Cement Mixer the documentation says to use a EP90 oil, but these days it seems that most outlets only sells EP80/90 oil. What is the difference and doe sit ...
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1answer
50 views

How to prep and level part of my garage when there is a 6" difference in hight?

Specs: Garage floor is cement 24'x32' (except where the car will park.) far side is approximately 6"lower than the other. (~1° slope) large crack running the full length. a number of smaller ...
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1answer
22 views

New basement - want to seal concrete

What would be the best product to seal a basement floor (brand new) that would not be slippery? How long should I wait before applying product?
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2answers
49 views

Using white cement + water to mould a part [closed]

I'm trying to cast a small robotics part for a local college. Its small in size but needs to be heavy. So far I've created one with epoxy resin and it is okay. However, for the same size, I wanted ...
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1answer
82 views

Will surface scuffs be a long-term issue in a new concrete walkway?

I'm probably being paranoid but would like to get some expert opinions as this is my first time dealing with concrete. I had a concrete path laid in the garden, around 80-100mm thick. It was laid and ...
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1answer
68 views

Is it safe to pour concrete and use mortar in freezing weather?

I have a 1947 cape (Cape Cod style home) in New England. The basement egress walls which are made of unfilled cinder blocks and run parallel to the house under the porch are caving in. I thus have ...
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1answer
263 views

Please help - wonky post location on pergola - concerned with shearing and stability

So ever since my wife pushed me to move the post off square I've been searching online (periodically for about a month and I've never found someone dumb enough to have done this and had a tutorial or ...
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1answer
538 views

Will using Redgard over a cement shower pan cause a mold sandwich if there are weep holes underneath?

I recently installed a cement shower pan but I had to use two pvc shower pan liners because of the size of the shower. I used the specified pvc cement to "weld" the two liners together at the seam. ...
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1answer
318 views

Medium-term repair for spalled foundation with exposed mudsill

I have an old house (built in 1946) near the ocean. The foundation in the back has spalled off, exposing the mudsill in some places. The worst spalling is 4" deep - you can see the mudsill and a few ...
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2answers
266 views

Can I use eye hooks in a cement retaining wall for my garden project? (Support climbing rose bushes against a cement wall.)

Here is a pic of the wall in question. Don't worry about the cracks. I already filled it in and am going to do the stairs when the weather gets drier outside. If you see the strip of soil that ...
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1answer
2k views

The best way to secure utility sink legs to concrete floor [closed]

I have a utility sink with metal legs which was never anchored when installed and would like to anchor it to the cement floor. Don't want to go to the expense of using Tapcon screws. Thanks for your ...
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1answer
121 views

How to fill recess in fireplace before tiling

I wish to tile a fireplace pictured below The brickwork has a recessed area directly above the firebox (pictured below) This recessed area measures 28" x 8" x 1-1/2" I wish to tile over the recessed ...
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1answer
70 views

Did the contractor installed the new layer of cement flooring correctly?

I apologize if this is not an appropriate question. I'm not really sure where to ask or who to trust. I have a basement that the ultimate plan is to put epoxy, but before we can get to that stage, ...
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1answer
297 views

cement cracked around mailbox

I cemented my mailbox to hold it steady but the cement cracked and now it is wobbly. Does anyone know why that happened? I probably need to dig the concrete out and replace it with new concrete and ...
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1answer
85 views

is this fungus?

There is water constantly flowing from the balcony of my neighbor on the asphalt and in turn splashing on the wall. There's a huge permanent stain there and looks like something fishy: Is this ...
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2answers
133 views

Is lime based mortar weatherproof?

I recently did some outside brick wall patching and tuckpointing. Since the old mortar was whitish, I didn't use the gray ready mix from the Home Depot but I mixed my own, the same what I used for my ...
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1answer
2k views

What mortar mix for flaunching on chimney stack?

What mix and sand\cement ratio's should I use for replacing a chimney stack flaunching? I've seen suggestions to add some sharp sand to the building sand, and other suggestions to add lime or ...
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2answers
902 views

Concrete Floor for 400 Gallon Water Tank

I am planning to build a concrete slab on a soil surface to hold a 400 gallon water tank (Shown Below). I want to make it 7' x 7'. It should hold about 3,500 lbs. Would I need to put in rebar? I've ...
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3answers
453 views

How to fill a hole in the living room?

There is the circular hole in the floor in my living room near radiator which leads to a relatively big space underground! If I want to judge using my eyes,I think the size is around 50cm/1.5feet ...
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1answer
457 views

Poured Cement wall repair and stucco

So I live in Ecuador and this house has been forgotten for 15 years. All of the walls are poured cement with stucco on them. This seems to work fine, except at times the water seeps in and ruins the ...
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0answers
16 views

Can i use non-tiled cement board -floor & shower shower stall?

Ground up bathroom build on (composite board) deck. I want an industrial look/not using tile. Some leakage is OK as it will be going through deck onto soil but would like to avoid mold. If I can keep ...
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0answers
18 views

How to add small ramp or level painted concrete?

I have a small patio (10'x6') with painted (oil based) concrete. It has a slightly uneven slope resulting in standing water with heavy rain. I would like to add a small ramp/slope to the top of the ...
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1answer
93 views

How to repair cement/flowable-fill slab cracks

I have a 5o yr old condo. The second floor is a cement or flowable-fill slab. There are cracks in areas and a pit in one area. Can I repair the pit and cracks or do I need to tear it all out? [![...
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0answers
363 views

Capping a toilet where flange is in cement

I have a couple of questions with the project I am working on. A little background. We currently had a bathroom right when you walked in from the garage. We never use it. Builder of house put it ...
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0answers
33 views

Basement has crack over a drain run no water leaking

I'm trying to figure out how concerned to be. Most of the basement has slate tile, but I tore out a kitchen, and discovered this crack running from the nearest wall, to the sink drain, and on across ...
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0answers
689 views

How to repair broken suspended cement slab

The very corner of the cement slab, which forms the floor of my basement, broke off. There was nothing supporting it underneath. the portion that broke off forms a triangle 11" x 10" x 14" x 3-6" ...
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0answers
71 views

How can I improve a poorly-done concrete patch in a basement slab?

I had a plumber dig a trench to rough-in a bathroom in my basement. The concrete repair was done fairly poorly. It had areas that bumped up higher than original floor. I had them come back to fix it ...
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0answers
81 views

Repair garage floor

How do I repair the cement edge to the entrance to my garage.
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0answers
70 views

Description of Concrete Classification Numbers (e.g. C15, C25 etc.)

I was reading my plumbing code and came across mysterious concrete classification numbers like C15 and C25. I tried googling it and only came across a couple of sources describing these numbers (like ...
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0answers
412 views

What causes these chips in a cement brick wall, and how can I fix them?

I have found my exposed basement cement wall which is about 15 x 10 in size to have quite a few areas where there is a cracked chip ranging from approx 0.5" in diameter to 2" in diameter and a few ...
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0answers
81 views

Should I use platicizer as an additive to mortar

I keep having problems with the joints in my patio flags, after each winter the joints often break up and it is a major job to keep the patio in good condition. I usually use a mix or Portland cement ...
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3answers
4k views

What could have caused an electrical shock from a concrete patio?

I didn't feel it myself, but my son-in-law and my own son said they were shocked when they touched the cemented ground in our backyard. We bought a new metal fire pit which we had set up and both men ...
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0answers
467 views

How to fix concrete delamination

When I made some concrete flooring (my first time doing it) I finished the surface while there was still bleed water (I didn't know it better back then). Now 2 months later in a few areas there is ...
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2answers
8k views

How deep do I cement a 21' tall, schedule 40 galvanized steel pole?

I have recently installed a new basketball goal for my kids. I now need to install a net behind it as the balls tend to end up in the neighbor's yard over and over again and it drives their dogs crazy....
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3answers
100 views

Will a cement mixer extend the working life of mortar?

I'm going to do some brickwork on my own. Last time it was quite the job to mix up mortar and get it laid before it started to go off (I know, working in pairs would be helpful!). I know I can ...
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1answer
91 views

Why do you need to not use cement when laying block paving?

When you lay block paving surely you have to lay it with cement rather than just sand as it hold the block down securely. So why is this?
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2answers
334 views

Material lighter than concrete for planters?

I'm trying to build several 24"x 24" square planters with each wall 1.5" thick, similar to the following picture. The issue is that each one of these planters will weigh at least 200 pounds (without ...
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1answer
131 views

What is an alternative to a cement truck that would allow more working time?

I'd like to know if there is an alternative to a cement truck. I'm planning to build a sports court which requires me to build a concrete foundation. I asked the cement company and they said the ...
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1answer
208 views

how to make a half circle tunnel through a cement slab?

There is a slab of concrete in my backyard, and I need to make a half circle cut out in it like this picture below. This is for a 3" pipe to sit in. How would I go about doing this?
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3answers
75 views

Cement vs. mortar for embedding stones in drive way

I will be scraping a dirt/gravel driveway down two inches and laying flat stones of various sizes and thicknesses. Need to have the tops at the same level, so some will need to have something ...