Oguieke:
your works here are generally poor starting from foundation excavation, blinding, bar placement, the oversight concrete, to the d.p.c block work,also your mix ratio is something else even when you claim its 1:2:4,the work here are generally poor.next time try to consult an experienced and COREN certified structural Engr to guide you properly to avoid hard I known. thanks.

podosci:

I am highly disappointed in your comment, partly because you claim to be a professional and such comments are unethical in a public forum and mostly because you speak out of ignorance in your drive to attract publicity for your own selfish reasons.
I am a civil engineer who majored in sturcutral Engineering with vast experience in strucutral design and building construction, all my works are backed up by relevant building standards and i can confidently stand up to defend them with extracts from building codes and literatures by known authors.
I wanted to reply you on the points raised but checked your profile and dicovered you are fond of going about discrediting works of other professionals in a bid to attract publicity to yourself.
I would imploy others reading this thrend to ignore your posts as they are irrelevant to the topic.
Thank you.

abdulwastecx:


I am on the same page with you on how to reduce weight of suspended slab but the misconception here is that the majority weight of slab is that of the conconcrete. In most cases, reinforcement bar contribute less than 10% to the weight of any structural members be it slab, column, beams or footing.

Another major contributor of load to suspended floor is partition walls. 225mm partition walls contribute as much as 3.6kN/m 2 when built on slab without bottom beam.

Best way to reduce load on suspended floor is reduce quantity of concrete and portion loads by using thinner section for upper wall, light weight materials for upper walls etc

back2sender:

AbdulWastecx can this be consider as part of the ways one can reduce the dead weight on a suspended slab... Using 6 inches block rather than 9 inches block on a suspended slab for a duplex? Reducing the number of pillars on the suspended slab to the roofing stage ? Using 12mm in place of 16mm for the pillars on the suspended slab to the roofing stage?. Thanks in advance

johnson232:

thanks
cc: Gbadesy any recommendations about water proof cement for sceptic tank sir...

gbadexy:

Sorry for the late response. Was a bit busy and didn't get the mention also because it wasn't spelt correctly.
I can't help you with cement brand that is waterproof. However, I could explain a bit on how to achieve a waterproof concrete.
You could add waterproofing additive into the plaster or use dispersant that helps you to get a denser and less porous concrete.
You may add 0.5kg of ground alum to a 50 kg bag of cement and add a big bar of soap dissolved in a 20 litres bucket of water to be used in the concrete mix.
So you use a bar of soap per each 20 litres water. You would have to soak it in water overnight to dissolve or add water to soap in a big drum at same rate.
The idea is to form aluminum stearate or palmitate with the concrete. They are as hydrophobic as wax and doesn't dissolve in water. So we depend 8 reaction to produce them in the concrete mix.
You could use a water glass solution in 2% ratio to the concrete mix to reduce the water used in the concrete mix to give a dense and impervious concrete.
That's the much I could help you with.
I'm in production and can only help with local sourcing and production.

abdulwastecx:


Your constructive criticism is welcomed .
When you have isolated pad footings of 1.2m x 1.2m, you don't need to place a form inside the foundation to demarcate the casting all you need to do is pecked the casting up to the required depth and in this case 350mm.

How do I know that the footing is 1.2m x 1.2m?
The basket is 110mm allowing for cover of 50mm both side.

What is plinth beam to begin with?
Plinth beam is an horizontal reinforced concrete member that is constructed on GROUND OR ABOVE GROUND LEVEL.

Go Google plinth beam and come back with more positive criticism.

By the way, I am a first class civil engineering graduate from a reputable University of technology. I know both structural analysis and design very well.

Mailthaddeus:


Bro! sorry to distract u from ur nice work, buh I still insist u get this one wrong. The relative densities of these materials are already constant. Batching by weight involves weighing these constituents of concrete in that ratio, that is, 50kg of cement, plus 100kg of sand(0.1tons), with 200kg(0.2tons) of aggregate.

While by volume is using a head pan of cement to 2head pans of sand and 4of granite/gravel. And only few people batch by weight except big batching plants.

Also, isolated bases, remain isolated bases, standard works requires form works and prepared specially.

Thumbs up for ur first-class, e no easy!

abdulwastecx:


Ok boss.
Minimum depth of strip = 900mm below ground level
Depth of isolated pad footings = 900 +225 = 1125mm

spatiakrux:


Are THESE info based on the recommendations of the structural analysis and design?

abdulwastecx:


I we say we sure have shortage of MONEY in this part of the world. In the developed world they have concrete batching plant that supply ready mixed concrete at point of concreting.

In United Kingdom, a good three bedroom flat bungalow goes for over £100,000 (almost 45 million) Niger naira. How many of you guys can pay such for a three bedroom flat in Nigeria?

You actually need a DPC or German floor for any kind of house and the cost is not that high when you compare it to the total project cost.

We build cave in Nigeria because we are still a developing nation, we are learning and our built environment is comparable to that of India, Pakistan, egypt and Brazil. These are all developing nation like us. We still have a long way to go and that is why supposed exposed people like you can come in and help us developed

podosci:

Yes sir

nursevee99:
boss you are doing a great job here i have been following your thread now i need your help please can you tell how many trips of sand that can fill a 4bedroom bungalow i have paid for 10trips it could not even filled the sitting room and the guest room please i need your help thank you.

abdulwastecx:


I will need to see some pictures of the foundation. Thanks for the complement

nursevee99:
i don't no if you can direct me on how to upload pictures because am new here.

nursevee99:
more of the site work

abdulwastecx:


Your constructive criticism is welcomed .
When you have isolated pad footings of 1.2m x 1.2m, you don't need to place a form inside the foundation to demarcate the casting all you need to do is pecked the casting up to the required depth and in this case 350mm.

How do I know that the footing is 1.2m x 1.2m?
The basket is 110mm allowing for cover of 50mm both side.

What is plinth beam to begin with?
Plinth beam is an horizontal reinforced concrete member that is constructed on GROUND OR ABOVE GROUND LEVEL.

Go Google plinth beam and come back with more positive criticism.

By the way, I am a first class civil engineering graduate from a reputable University of technology. I know both structural analysis and design very well.

podosci:

The blockwork is not loaded on the slab, Its loaded on the beam. Its only in cases where there is no underlying beam or load bearing walls that the load is directly on the slab(Thats another discussion entirely)
One of the pillers of Structural Engineering is Economy, Thats whats guides during our structural dedign in placement of pillers and selection of sizes of structural members.
The best Economic way of reducing load and cost is to carry out a proper structural design by a competent Structural Engineer.

Drbarmes:

Bros as a civil engineer u are supposed to be supervising building construction. Leave that to a builder cos he has a better knowledge of cost management than u. The introduction of plinth beam for a uniform soil like urs is a waste of resources. Plinth beams are mostly used where u have a soil with even bearing capacity to tie the foundation columns and distribute the loads round the foundation.