New Building and Construction Technologies

Since you do not even give the location, we cannot help you.

I appologise,for not mentioning the location .

My first object is to know about the technologies,in the field,secondly the materials which can replace steel ,concrete or wood .

locations can be india ,pakistan ,china ,iran ...............africa

even in usa or other developed countries .

the ratio of cost of materials and labour is between 70% and 30% .....average for discussion purpose .

We should look for low cost materials and less Labour component.Hope it clarify .Thanks for the reply

Hello Guest,

you gave some really interesting sites on your post.

Why not join, you get so much from the guys and girls on here!

Hello daud46@hotmail.com:

my Father was employed, it was not his company, and built 'test' buildings with a system where an appropriate sized air bag, like a huge bladder was inflated. Reinforcing steel was then applied and bent to fit the bladder. This was then covered on concrete and left to set.

Once set, the air was released from the bladder and any windows and doorways cut.

Sorry but I cannot recall what the technical name for this. But, for single to two to four story structures it seemed to work, though the structure made were built over 20 years ago. It may still be around and in a 'modified' design? I cannot tell you that. As you are more expert than me (for certain!) you may have heard of this or similar? Not sure about costs though.

Thanks.Yes i know about this system ,but havent used in my life .Generally godowns ,and structures like that were constructed ,with Baloon as a supporting system .But i am not familier with multi storied buildings .Secondly housing has a totally different requirements .

Any how i do appriciate that your mind has gone to the right and different direction .

In my view ,the technology should have cheap construction materials and less labour cost.

thanks

Hello daud46@hotmail.com:

As you have pointed out in your post to me and others I was not aware of the type of building you had in mind, (its purpose, out building, residential etc). I had nothing to do with these buildings. Though I do recall they were built over a period of a year and increased in size from about 3 metres to around 8 metres. Though the larger one was wider and so could be built higher, and was high enough to have at least one floor, + ground floor. I know the thinking was the metal bars would be pre-shaped to fit a particular sized structure. It could have been welded off-site in parts like a slice of a cake, light enough for a couple of people to move.

The structure had pumped concrete but the is no reason why this could not be done by hand. Enough people and you would not even need a 'cement mixer'?

It was designed to eliminate scaffold and and wooden structure to support the concrete until it was dry.

That being said...........I realise you may be referring to a more basic structure.

There is all kinds of possibilities. One is where a whole is dug which is about as deep as half the height of the finished building. The roof and partial outer walls could be made from wood. Or some kind of woven structure from any available local forest, if there is one.

Another method is to go back 800 years. And make the building as a framed structure, like old English houses were built. With any blank spaces filled with a rubble mix and or plaster?

Another way, is to to to make standard shaped panels with edge flanges from fibre-glass, and or steel and these can be assembled on site?

One thing I have had in mind for a long time, is a double walled tent type structure. With the space between the layers filled with very light plastic or paper packing material. This will give more rigidity. And stop any heat escaping. And one corner of the structure used for cooking would be made from steel sheet to prevent the tent structure catching fire. The floor can be sheet plastic.

I will keep an eye on this thread. As it looks very interesting!

is this like a geo dome?

Hello blackhorse:

please forgive my not replying. I did not notice you had sent anything for me and, I have been on and off-line through various reasons lately, so am not fully up-to-date with all threads.

It is like a geo-dome. Like an upturned basin kinda geo-dome with no windows. Spaces for these are cut and windows fitted after the concrete has set and the bladder removed.

I only ever heard about it as a 'test'. But apparently this method did actually make it to the real world of buildings. Not that I have seen any mind. I am going on what has been said by, I think the original poster.

Take care, and sorry about the long wait for your reply!

Hello blackhorse:

check out this site which has some really beautiful new type dome buildings.

http://younker.us/

Buddy,

you will finde the real solutions in the page: www.LEMAK.se

and so be in connect with him, he know the real stuff, ok.

Hello Guest,

why not join?

The site you list has some amazing buildings! The designs are so unique, really clever and they look good as well! Seems the place to go for ideas for sure.......

take care

A new technology that I have been fascinated with, and want to specify in my next house, is structural insulated panels (SIP's). Typical SIP fabrication is extruded foam sandwiched between plywood skins.

One US company has designed a new SIP by using waste straw coated with resin for the inner core. This is "green" construction by using both a recycled and renewable material.

Click http://www.agriboard.com/ for company info.

Hello Delmar:

the panels you mention sounds great. A lot of new building has SIP's. Used a lot in the roof area and especially in buildings like offices, schools and, partly inhabited structures. These types of buildings use a lot of prefabricated structures and SIP's panels are easy and quick to add to already built structures. And of course they safe a lot in heating and insulating costs. These SIP's are a fraction of the thickness of even similar things made for insulation. Modern ones are just a couple of cms thick. Compared to more than ten times that 20 years ago!

I will look at the site you mention asap. It certainly does sound green.

There was a time when I planned to build from straw bales. It takes a lot more space but, is very eco friendly keeping virtually all heat in. There is designs and books available all over the place, and the straw is wrapped in a waterproof membrane. Perhaps the only 'un-green' part of the building?

I would imagine it would be pretty cheap compared to brick and wood as the main structure, though how it compares I am not sure.

Takes a whole new mind-map in building like this though. The other advantage is the straw is a great sound barrier as well.

This might be the technology you're looking for…or may interest you.

http://www.tridipanel.com/content/view/24/207/

The 3-D Panel is a unique and effective way to easily create a strong insulated concrete building or wall. 3-D Panels are used in every type of concrete structure because of the flexibility of design and ease of use. Thousands of structure and walls have been built around the world with 3-D panels. Many of them use the panel for all elements of the structure including walls, floors, stairs and trim. 3-D Panel is used for affordable housing all the way to multi-million dollar housing. Residential, commercial, institutional multi-story all can be created easily with this remarkable code-approved method.

The strength of the 3-D system is enormous and is partially attributed to the truss wires that are welded to connect each side of mesh to make the panel. The insulation in the center of the panel is suspended on the truss wires and becomes a continuous thermal break when panels are connected. The performance of the insulation thus is greater than the R-value rating because of the thermal-mass effect of the concrete on each side of the panel.

The monolithic structure with 3-D panel enables it to withstand earthquakes, hurricanes and typhoons. Many 3-D buildings have endured hurricanes with no water penetration or damage, earthquakes with no cracking and at the same time provided a comfortable and energy-efficient environment for the residents. In the U. S. today there is a strong movement towards concrete housing. The 3-D Panel System is perfect for this market. It provides hard walls and perfectly placed insulation for maximum efficiency. Stay-in-place forms today use polystyrene as molds for concrete and end up with soft exteriors and exteriors which have to be hardened. In the process, they lose the thermal mass effect necessary for energy efficiency. Unlike concrete block, the 3-D panel provides the insulation and reinforcement strength to concrete, which makes it acceptable for residential or commercial construction.

Since the introduction of the 3-D Panel for construction of walls, several new uses have emerged for the panel. The 3-D Panel System has been described as Twenty First Century technology available today. The revolution in construction technology has started and the 3-D Panel is out in front.

Thanks.I am looking for a more latest technology . in my view ,this technology is not being used very extensively.This methodology does need labour componet ,nearly 60---70--% same as of convential system.Any how thanks for sharing

Please look up my :

www.innovation2survive.com--- chapter on Precast

normal cement Concrete can be made at 30% cost/time compared to "Conventional(Government approved )" norms.

Good for Tropics-Subtropics-Temperate zones.

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