₦airaland Forum

mufutau55:
Most do wet the concrete, so it does not crack...
I remembered doing that on my deckings for a whole week both early morning and evening. I prefer to leave my deckings for the whole month to cure... why rushing when I am not in competition with time or anyone. Safer than sorry.

Hajji M.

kopell:
I believe the major reason why most of those buildings are coming down in opinion, is the compromise in the integrity of the structural Iron component, for example if structural engineer recommends 16mm rods for section of the building with his calculations of weight. When going to purchase materials I’ve seen many 9mm rods label as 12mm and the cost is clear, those are sold for N 1750 each, while the right one and full size of 12 mm is sold N 2,200. The owner have to make decision on which one to buy. l bet you many of them will go for the cheap ones. I don’t understand why the engineer will put his name in line to forge ahead to continue the project when he knew is going to be disaster at the end, just because he wants to make money. In conclusion I think it better for engineers to proper advise their clients the danger of trying to save thousands and end up wasting millions with and people lives.

gbadexy:
This looks massive. I guess the engineer didn't want to take chances.

n3xt:
Ponding works well on slab.

gbadexy:
I'm really curious though if we further wet our concrete for at least the first three days here in Nigeria. I haven't really noticed it.
I observe during my research on external screeding material using cement that wetting cement for in the early morning and late evening when the water would not quickly evaporate before the cement can fully utilize it for two to three days after the initial setting gives it very massive difference in strength than if it wasn't given subsequent wetting.
The cement still needs it water after that but gradually from the environment, excess unutilised water within it and so on.

gbadexy:
I think those additives are plasticisers that allows concrete be cast with little amount of water to form a compact and dense concrete but I don't think that still takes away the fact that the concrete needs the water over a period of time to attain maximum strength.
Accelerators may speed up the seeding and the initial setting period but it still needs full hydration for strength. Water is the only major thing that gives concrete it's strength from my understanding and while initial setting could be sped up, the full hydration for maximum strength would still take its own time.
Concrete with higher ratio of cement to water made workable with plasticisers would still be far more stronger after proper full hydration than it would be in the first few weeks.
Just my opinion from the setting of cement.

smallsmall:
It does not have to use remote control, some have a sensor that is installed in each resident's car and would open the gate for such car automatically.
Some use a Wall-mount 4-Code Devide, that only the Tenants know, to open the gate.
I have seen it done in some HighRise Buildings with over 20 Flats each, so l know it can be done.

Why would you give your own remote to your friend, compromising the safety of the whole compound?
Everybody has a parking spot and residents cars have stickers, anything apart from that, you get clamped.

#NotABibeli and I am having stomach ache right now so please dont quote me.

vickzie:
how do you motorize a gate of 6-8 flats apartment building and every tenant having a remote, can the motor remote be duplicated like we duplicate car keys? and if possible, how do the landlord ensure that it's only the tenants that have access to the remote ( ie friends of tenants not having access to the remote)

bixton:
This topic is one of the reasons I enjoy structural construction works.

https://www.quora.com/How-long-did-it-take-the-Hoover-Dam-concrete-to-cure

EgunMogaji2:
There’s been heavy rains. Could be foundation issues and not illegal aliens

Just saying

EgunMogaji2:
We don’t know what caused the collapse yet.

n3xt:
Hmmm! This is valid but...

In as much as the industry do not care so much about enforcing best practices and investors/homeowners do not have x-ray vision to know the difference between a versatile and a cowboy engineer-contractor. I think it’s safe to say construction work shouldn’t be rushed

Why?

The following are loads acting on the beams/slabs:

1. Self weight
2. Construction load
3. Weight of upper floor (from props)

For most developers, they play with spans of the slab to achieve fast projects (that’s why you see them build compact houses). When the span get larger, the self weight portion will start governing and this will require higher number of days of propping for the concrete to achieve maximum strength.

Propping might fix slabs and other horizontal structural members but what happens to the most victimized vertical member (the column) if it did not attain maximum strength before imposing loads.
Improper curing is one of the major reasons for concrete failures in columns, beams, slabs and a major cause of visible cracks in most house.

So instead of making people to assume it’s safe to build a house within 30 days, I think professional builders should caution homeowners and investors who want to tow that path to allow more time for their project.

______
LASBCA/LSMTL cares so much about cube tests which is fine but doesn’t guarantee safe construction if the builder failed to consider the significance of concrete curing for the durability of the structure.

______
Unfortunately all the association and bodies that are supposed to enforce best practices only care about generating revenue from stamping and affixing seals on drawings. They don’t care about what happen on project site. ARCON, COREN, NIOB, NIA, etc.

Yet we blame SARS

Four yet-to-be-identified persons lost their lives on Sunday when a three-storey building collapsed in the Obalende area of Lagos Island, Lagos State.

The PUNCH gathered that eight other persons were injured.

The General Manager, Lagos State Emergency Management Agency, Olufemi Oke-Osanyintolu, confirmed the incident.

He noted that the affected three-storey building located at 62, Odo Street, Obalende, Lagos Island, was under construction when it collapsed.

He said, “Upon arrival at the incident scene, a three-storey building under construction was discovered to have self-collapsed.”

The cause of the collapse is yet to be ascertained, but efforts are presently ongoing by LASEMA and other responders towards salvaging the situation.

“As of 05:40pm, a total of eight people (all males) have been extricated alive by the LASEMA Response Team and other stakeholders, and have been attended and quickly transferred to the hospital by LASEMA paramedics for further medical attention at Lagos Island General Hospital.

“Four persons (three males and one female) have so far been recovered dead and handed over to SEHMU at the incident scene.”

He added that the recovery operation is still ongoing.

modsfucker:
I'm not against the protest, but I'm against the sheer stupidity people are displaying out there... How can you invade a Police Station and expect a warm welcome?

I saw several videos of the purported protesters provoking security men with guns all in the name of protest... Haba, even the US, UK they're calling on won't allow this nuisance.

The struggle has apparently been overtaken by criminals.

GOTVee:
As a born again Christian who is meant to speak the truth at all times, i think banning sars Is wrong and we should learn to live with their excesses. Majority of present yahoo boys are future armed robbers. What do you expect someone who doesn't have any skill than stealing from people to resort to when yahoo stops paying? They either commit suicide or turn to armed robbery just to live above their means. This is why i blame we Christians for encouraging this menace called yahoo boys. Even in churches the pastors don't care if you scam or rob people as long as you bring money to their temple. How many Muslims are involved in yahoo? How many Northerners have SARS operatives harassed? Are there no sars in the north, why are northerners not complaining like we southerners? We Christians need to learn a lot from the ways of life of the average northern Muslim. Their ways of life is guided with the tenets of Islam and they are so contented with whatever they have and would never get involved in cyber crimes.

Don't you realize that the average yahoo boy and cultists poses a security threat to your lives in future? Do you know how many have died as a result of the atrocities of yahoo boys? We need SARS to deal with those heartless vermins. Yahoo boys are no different from armed robbers. They only rob with phones, gadgets and deceit and since SARS are against robbery they must keep tracking every youth living above their means . Instead of ending SARS, why don't we end fraud and build a sane society?

I support SARS sad

bixton:
As regards the bold 1 for effective curing the form work holding the columns needs still be intact with appropriate bracket/braces holding it at intervals/sections.

With regards to bold 2&3.... I think it would not be fair to generalize that improper curing is a major reason/cause.................I believe for failure or cracks to appear on concrete it takes about 3 other elements to be of low quality/standard being used before such will occur.

kingzsoul:
No i dont

kingzsoul:
It's asolo ikorodu. Plan not ready yet

Chekitaut:
Pls we have not advance to that... Pls observe due process... I dey talk from experience, if them push u, no push urself. Na advice.

clydedaniels:
This is the quality of policemen we have in the country

kingzsoul:
Good evening house. I asked about how possible will 1million fly for raft foundation for a 2bedroom apartment with a penthouse. but got a very few response. I've increased my budget to 1.5m. Please can it still fly?

obehi247:
The only reason this protect still calm is because student are at home with their parents beging and even fighting them not to go outside and join the #EndSARS protest



How wish them dey school with nobody to regulate their movement, this thing for don turn revolution since

bixton:
Built environment does not have boundaries or restrictions as long as the engineer-contractor is versatile in thoughts and approach to job.

bixton:
What limitations do the industry have against the bolded......