mufutau55:


Welcome back.. I know you have been very busy, so I decided not to bother you..
How is our new girl and the Mummy.. Congrats.

Hajji M.

They both great sir....thank you sir..how is work sir?

engrgordon:
good job going on here, Kudos..... I love my profession........ Can part of the project be sublet to me? DOUBLE INTEGRATION MULTI-PROJECTS SERVICES(DIMS) , WE BASED IN PORT HARCOURT.

when there is need to involve the service of a sub contractors we will surely get in toucch with you sir..thanks

abdulwastecx:


when there is need to involve the service of a sub contractors we will surely get in toucch with you sir..thanks

thanks for your concern my proffessional coleague,hope the work is moving smoothly well.

engrgordon:


thanks for your concern my proffessional coleague,hope the work is moving smoothly well.

yes sir

There have been some delay due to need to increaase the dpc level

Pics

Septic tank

More

After many disappointments by suppliers will started moulding blocks ourself

Block moulding
1. One trip of sand
2. 30bags of cement
3. N800/bag to mould the block

We actually get 30blocks/bag and we get 30bagsper each trip of sand

Total blocks per trip of sand = 900blocks

The block is stronger and cheaper by N50/block

Thanks for this info. Is the trip of sand 5 ton or 10 ton? I want to ask you how many trips of 5 ton sharp sand can set (not mould) 5000 blocks? Thanks

micbjrex:
Thanks for this info. Is the trip of sand 5 ton or 10 ton? I want to ask you how many trips of 5 ton sharp sand can set (not mould) 5000 blocks? Thanks

A bag of cement will set 60blocks using a mix ratio of 1:6.
You need 83bags of cement for the 5000blocks
You need about 25tonnes of sharp sand to lay the block

Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

Can we see the plan and 3D, if any, for this school block so that we know what to look forward to.

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the columns
the height of 6'' block is = 225m
15 courses = 15 x 225 = 3375mm
assuming a thickness of mortar of 2omm = 20 x 15 = 300mm
total height of column = 3375 + 300 = 3.675m

column reinforcement length = main height ( 3.675) + bottom anchorage ( 0.15) + top anchorage (0.15) = 3.975m
y12 length is 12.3m, No of bars = 12.3/4 = 3bars

Bar required per column = 4
total Number = 4 x 15 = 60
No of bars required = 60/3 = 20bars for the longitudinal reinforcement

for the rings using Y8 and spacing of 300mm c/c
length of links for a rectangular column of 225 x 150 ( due to the 6'' side) and allowing for cover of 20mm
L= 900mm
Number of links in a column with 3000mm spacing = 13 links
No of L in one length of bar = 12.3/0.9 = 13links
Total number of Y8 required for the link = 15Y8



for the concrete
volume of concrete = 0.225 x 0.15 x 4 =0.135m3/column
total volume of all the 15 columns = 0.135 x 15 =2.025m3
using a mix ratio of 1:2:4
part of cement = 2.025 x 1/7 x 1506/50 =9bags of cement ( use 12 bags allowance for shrinkage and wastage)
part of sand = 2.025 x 2/7 x 1.6 =1tonnes of sharp sand
part of gravel = 2.025 x4/7 x 2.4 = 3tonnes of gravel

summary for the column reinforcement
s/n Descriptions Quantity unit rate amount
1. Y12 20 Nr N1,200 N24,000
2. Y8 15 Nr N800 N12,000
3. Dangote cement 12 bag N2,000 N24,000
4. sharp sand 1 tonne N 3,00 N3,000
5. Gravel 3 tonne N 8,000 N24,000 ( port Harcourt price)


6. workmanship N36,000
Total = N123k ( minus the cost of formwork)

Onuokwu:
Can we see the plan and 3D, if any, for this school block so that we know what to look forward to.

I will upload the plan view and the elevations tomorrow.... as for the 3D, I am not sure If I can lay my hand on any but before we finish the job I will do a 3d of the school

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =N14,400[font=Lucida Sans Unicode][/font]

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =[b]N14,400[/

micbjrex:
Thanks my oga....hope your going going...you re doing a good job. please bro, pls help calculate the ton of sand, ton of gravel, 12mm iron, rings, cement to construct 15 pillars (height of about 15 coaches of 6 inch block), 21 windows (11 nos of 1800mm, 3 nos 0f 1500mm, 2 nos of 1200mm, 5 nos of 900mm.

19 doors [17 nos of 900mm, 2 nos of 1200mm]
2 arcs of 2400mm.

thanks

for the doors and windows, it will be better to get the price from a local distributors
for the 2 arcs:
items
1. 3 bars of Y12 N 3,600
2. 2 bags of cement N 4,000
3. 1 bar of Y8 N 800
4. sand and gravel from the column
5. workmanship
6.workmanship = N6,000
sum =N14,400

Thank you but what about materials for doors and window
From your post, I understand that I will need 20 rods for the longitudinal pillars, 15 links.....i dont get that part, please help break that down in layman's term, 12 bags of cement, 1 ton sand, 3 ton gravel

then for the 2 arcs, i need 3 rods, 2 bags of cement, 1 bar of Y8 rod, then use from the above sand and gravel.

please, help do the math for pillar base mat and doors and windows too..thanks

micbjrex:
Thank you but what about materials for doors and window
From your post, I understand that I will need 20 rods for the longitudinal pillars, 15 links.....i dont get that part, please help break that down in layman's term, 12 bags of cement, 1 ton sand, 3 ton gravel

then for the 2 arcs, i need 3 rods, 2 bags of cement, 1 bar of Y8 rod, then use from the above sand and gravel.

please, help do the math for pillar base mat and doors and windows too..thanks

I mean u need 15 no of Y8

Good morning Op.i Am late to class hope u can reply my question .Good practical class, may god bless you the more ..amen..

jfkenny:
Good morning Op.i Am late to class hope u can reply my question .Good practical class, may god bless you the
more ..amen..

amin sir...provided I can provide. reasonable answers to them.... you are welcome

abdulwastecx:


amin sir...provided I can provide. reasonable answers to them.... you are welcome

Thanks and do justice to these:
1.What is the correct cement :sand mix for laying blocks.
2.I always read 1:2:4 as standard for concrete mix but I have not seen the builders implement such. what I normarly is 1 bag of cement:8head pans of sand :10headpans of stone. Or sand and stone will be made equal 8:8.
Thanks and b blessed.

jfkenny:

Thanks and do justice to these:
1.What is the correct cement :sand mix for laying blocks.
2.I always read 1:2:4 as standard for concrete mix but I have not seen the builders implement such. what I normarly is 1 bag of cement:8head pans of sand :10headpans of stone. Or sand and stone will be made equal 8:8.
Thanks and b blessed.

In order to achieve a minimum concrete strength of 25N/mm2, a mix ratio of 1:2:4 ( 1bag of cement to four head pan of sand and 8 head of gravel. The sand most be clay free, The gravel must be retained on 20mm sieve. Water for the mixture must be drinkable and water to cement ratio can either be 0.45 or 0.55

Note the following:
1. The more the water content of a concrete the weaker the concrete
2. Most of concrete strength comes from the coarse aggregates (gravel)
3. Cement serve as a binder
4. Sand help to filled the void space between gravel and increase the volume of concrete

The correct mix for laying blocks is 1:6
One bag of cement to 12 head pan of sharp sand
.

abdulwastecx:


In order to achieve a minimum concrete strength of 25N/mm2, a mix ratio of 1:2:4 ( 1bag of cement to four head pan of sand and 8 head of gravel. The sand most be clay free, The gravel must be retained on 20mm sieve. Water for the mixture must be drinkable and water to cement ratio can either be 0.45 or 0.55

Note the following:
1. The more the water content of a concrete the weaker the concrete
2. Most of concrete strength comes from the coarse aggregates (gravel)
3. Cement serve as a binder
4. Sand help to filled the void space between gravel and increase the volume of concrete

The correct mix for laying blocks is 1:6
One bag of cement to 12 head pan of sharp sand.

Thanks for the lecture..

jfkenny:

Thanks for the lecture..

Sorry.. It should be to 12 head pan of sharp sand not gravel

abdulwastecx:


In order to achieve a minimum concrete strength of 25N/mm2, a mix ratio of 1:2:4 ( 1bag of cement to four head pan of sand and 8 head of gravel. The sand most be clay free, The gravel must be retained on 20mm sieve. Water for the mixture must be drinkable and water to cement ratio can either be 0.45 or 0.55

Note the following:
1. The more the water content of a concrete the weaker the concrete
2. Most of concrete strength comes from the coarse aggregates (gravel)
3. Cement serve as a binder
4. Sand help to filled the void space between gravel and increase the volume of concrete

The correct mix for laying blocks is 1:6
One bag of cement to 12 head pan of sharp sand.

12head pan of sand not gravel, please take note

pls,wat abt d plan u said u willpost d other time.

segzy14:


12head pan of sand not gravel, please take note

Noted

Sir in 1:2:4, will the sand and cement be able to bind the stone if the size of the stone is bigger than gravel..
Sir which is preferred: constructing an overhead tank for baths separately on mounting the tank on top of the building in a bungalow..

jfkenny:
Sir in 1:2:4, will the sand and cement be able to bind the stone if the size of the stone is bigger than gravel..
Sir which is preferred: constructing an overhead tank for baths separately on mounting the tank on top of the building in a bungalow..

it is cheaper to mount the over head tank on top of a platform (slab) Constructed on top of the building

floor rate is a function of height ( Known as head in hydraulic). all you need to have sufficient head is to locate the tank at higher level than the bath.

It is important to plan properly for this and to design the columns and beam supporting the platform.