Ferrocement designing buildings wiki share your construction industry knowledge. A crash course in roof venting by joseph lstiburek understand when to vent your roof, when not to, and how to execute each approach successfully roof venting 101 vent the attic space to ensure that a vented attic performs at its best, you need to get the details right. Construction using ferrocement industrial processes concrete. Ferrocement technology offers a better way to build structures to withstand a. Jun 04, 2011 a team of folks in africa make some 7. Construction using ferrocement industrial processes. In addition, two types of support channels were investigated to obtain the optimal tensile reinforcement for channel in direction of the y axis. Ferrocement roofs for earthbag structures 6 comments eogreensticks on october 29, 2010 at 9. The performance of such slabs was compared to those of cellular concrete slabs and commercially available hollow blocks. A crash course in roof venting building science corporation. Evaluation of concrete and various meshes on ferrocement roofs. Cbpevl35jfs 6949 cl2 lineal 312 j channel 12 6 flagstone 10 21 210 7. This paper includes the construction process and compares construction cost of ferrocement roofing channel system with conventional roofing system. Definition ferro cement is a type of thin wall reinforced concrete, commonly constructed of hydraulic cement mortar, reinforced with closely spaced layers of continuous and relatively small size wire mesh.
Ferrocement or ferrocement is a system of construction using reinforced mortar or plaster lime or cement, sand and water applied over an armature of metal mesh, woven expandedmetal or metalfibers and closely spaced thin steel rods such as rebar. The building system uses precast ferrocement roofing channels of a segmental arch profile which are placed adjacent to each other and spanning over two. It is easy to construct, uses less cement and steel than a conventional rcc roof and is also cheaper. He soon used this material to construct several roofs and small tonnage vessels. It is precastusing moulds n a ferrocement channel uses less.
Structural design of the cablenet and fabric formed. Jun 17, 2011 a couple of dozen africans and a couple tubabs lift and put in place five 400 kg ferrocement roof channels. Applications of ferrocement are numerous, especially in structures or structural components where selfhelp or low levels of skills are required. Pdf investigation of ferrocement channels using experimental and. Development of alternative roofing system by using. Ferrocement is a construction technology which can be used almost every where e.
In pune, at nicmar two storeyed hostel building having 10 rooms on each floor is constructed by using ferrocement flat floor slab and cone formation type ferrocement roof slab. Roof slope the minimum roof slope for centurydrain and 5v is 212 to 12. Here are five rules that are critical to the success of this simple roof design. Applications include fishing boats, water tanks, silos, roofing channels, dwellings etc.
Some common types of damage that occur in ferrocement are delaminations, spalls, scaling, fire damage and local fractures. This roofing system is designed as a segmental element, which is very easy to cast, cure and then manually erect over the bearing walls. Applying the ferrocement concept in construction of concrete. Investigation of ferrocement channels using experimental. If slope is below 3 to 12, sealant is recommended at end lap and side lap conditions. Small capacity water tanks cupboard slabs roof and wall elements shuttering for concrete construction service core units toilet component furniture tables, shelves, sofa sets. Two types of channel sections and one type of box section. This roofing system is designed as a segmental element, which is very easy to cast, cure and then manually erect over the. One particularly popular use for ferrocement is water tank construction. Ferrocement is a construction material that proved to have superior.
Ferrocement roofs for earthbag structures natural building blog. Ferrocement is a construction material consisting of wire meshes and cement mortar. Over the years we have used ferrocement to develop many innovative structures, for specific requirements of both public sector bodies and private clients. Ferro cement is a very good fire resistant material having capacity to resist fire up to 750c for long period of 48 hours and even more. Description the roof of hilo is an anticlastic, thin shell structure to be constructed using a prestressed cablenet and fabric formwork. Ferrocement can be monolith, jointless roof eliminating trusses and purlins nuts and bolts and joints as in the case of ac sheet metal sheets roof. Re roofing check with local code official for re roofing restrictions and landfill disposal should existing roofing need to be removed. The community is heavily affected by hivaids and there are many widows and single occupancy households. Besides boats and marine structures, ferrocement is used for housing units, water tanks, grain silos, flat or corrugated roofing sheets, irrigation channels, and the like see aci 549r. Openframe ferrocement tank 140 closedmould ferrocement tank 141 pumpkin tank 143. Ferrocement resists cracking very well and, due to its thinness, uses very little cement. Jan 24, 2012 make ferrocement roof panels on the ground so you dont have to plaster overhead. I have found a local almost supplier finally for the magnesium cement and an article about a beautiful gekko sculpture but the artist used a combination of portland cement and sand with only 15% magnesium oxide plus flyash and an.
A ferrocement channel uses less cement and steel while having the same strength as the same rcc. We are equipped to provide full scale consultancy for a ferrocement product starting from its design, setting up its manufacturing facility and managing its production. I was thinking about strength against external forces like if a cow leans against it or a tractor backs into it or even wind forces. Rainwater harvesting case study construction of household rainwater harvesting jars in uganda wateraid has been working to improve household water supplies in a ugandan village where 3,000 people lack access to safe water. Ferro cement is a form of reinforced concrete using closely spaced multiple layers of mesh andor small diameter rods completely infiltrated with, or encapsulated in, mortar. Pdf it is necessary to design and calculate tensile reinforcement for. Till now ferrocement components are largely being produced by manual methods of casting in the country. In addition, two types of support channels were investigated to determine the optimal tensile reinforcement for the channel in direction of the x and y axes. Ferro cement can be modified to resist even high temperatures, say 1200c to 1500c. For small projects, simple curved shapes of ferrocement make a good roof.
Reinforced concrete beam, ferrocement, strengthening, deflection i. A model for low cost shelter with arched ferrocement roof and bamboo mat wall armature. If it were full, it would likely still hold, a thin tank would likely still hold against external forces thanks to the internal water pressure, but it could be easily damaged if it were empty. The building system uses precast ferrocement roofing channels of a segmental arch profile which are placed adjacent to each other and spanning over two supports. The easy way to make ferrocement roof panels natural. Construction using ferrocement free download as powerpoint presentation.
It is a highly versatile form of reinforced concrete. Aljabri department of civil and architectural engineering, sultan qaboos university, sultanate of oman abstract this paper presents the experimental results of nine roof panels made of ferrocement. Guide for the design, construction, and repair of ferrocement. Ferrocement roof shall transfer much less heat as compared to ac sheet metal sheets roof. Both of these documents are intended to supplement the main instructions in aci 318. The metal commonly used is iron or some type of steel.
Two types of ferrocement roofing units have been developed at the centre. Study of fullscale elements of a ferrocement roof system. I just found this great technique for making ferrocement roofs at steves flying concrete site. The ferrocement channel section beam had a moment capacity of 19. The wire framework will hold the pieces together, which in some applications boat hull, ceiling and roof is an advantage. Investigation of ferrocement channels using experimental and finite element analysis article pdf available june 2015 with 415 reads how we measure reads. It is precastusing moulds n a ferrocement channel uses less cement and steel while. Besides boats and marine structures, ferrocement is also used for housing units, water tanks, grain silos, flat or corrugated roofing sheets, and irrigation channels aci 549r.
To propagate this technology for wide scale application and with a view to introduce mechanisation for better quality and productivity, bmtpc has developed a machine for production of ferrocement roofing chan. Investigation of ferrocement channels using experimental and. Ferrocement water tank, ferrocement house, and ferrocement boat ferrocement can be used to construct a wide range of structures including boats, houses, and grain silos. Fc are used for floors or roofs, but are bad thermal. Two types of channel sections and one type of box section were tested. At that future moment the one bar will have become a supported armature as hard as ground. Ferro cement buildings are better pollution and fire resistant as compared to rcc. The technology is still in its infancy, but has already been used to produce intricate sculp. In this project they used rebar and mesh for the roof and recycled. That bar is the first step toward a time just before placement of concrete plaster. The mesh may be made of metallic or other suitable materials.
Unfortunately, this book cant be printed from the openbook. Improper curing results in cracks and leaking problems. Indian institute of technology experimental verification of bamboocomposite bow beam with ferrocement band. Pdf this paper presents the experimental results of nine roof panels made of ferrocement. This post explores two earthbag structures on our projects pages that have ferrocement roofs. It looks like corrugated channel with ridgevaleey type. Currently were working on building a 40x40 onfarm slaughterhouse and butcher shop which will a have ferrocement roof.
The cracks often affect the structural action or the durability of ferrocement significantly. The models can be used to obtain optimal span of ferrocement channels in different applications such as roofs and floors which have unalike maximum loads. Make ferrocement roof panels on the ground so you dont have to plaster overhead. S6studied the applications of ferrocement as housing units, water tanks, grain silos, roofing components, irrigation channels, boats and marine structures. Introduction in 1943 pier luigi nervi tested and presented in his paper, a new structural elements, an extremely thin plate of concrete made of layers of small diameter wire mesh and cement mortar with sand used as the binder. Steve explains how to make roof panels on the ground so you dont have to plaster overhead. Flexural behaviour of ferrocement roof panels conference paper pdf available in wit transactions on the built environment 85.
A ferrocement construction has 10 to 25% of the weight of a comparable construction made of bricks. Details of precast concrete dwg detail for autocad designs cad. If you need to print pages from this book, we recommend downloading it as a pdf. This book presents the latest developments in research and application of the material. As an example, a ferrocement tank manual describes the.
Ferrocement channels n a ferrocement is a thin wall of reinforced cement, where layers of continuous mesh are covered on both sides with mortar n ferrocement elements are durable, versatile, light and waterproof n a ferrocement channel fc is a longitudinal element of a curved section oftensemicylindrical. Ferrocement is a composite material made up of mortar and light wire steel mesh. When a ferrocement sheet is mechanically overloaded, it will tend to fold instead of crack or rupture. Appliedscience laboratories in developing countries and technical assistance agencies should seriously consider this area for field trials and techno economic studies. Ferrocement roof, sprung arch ferrocement photo gallery. Re roofing over most existing fiberglass or asphalt shingles can be done with centurydrain.
The cement is typically a very rich mix of cement and sand in a 3. The amcor system features advanced, patented, ferrocement technology. Prior to opening his own engineering firm in oregon in 1997, he was a professor of engineering at northern montana state university and at oregon institute of technology. In this oer we learnt about ferrocement technique, history of ferrocement, stapes of ferrocement construction, material use for ferrocement construction what is curing, precaution of curing, uses of ferrocement construction. These models were also developed to determine the optimal span of ferrocement channel under various uses e. The irc itself is very limited in its design flexibility for concrete walls and roofs. The shell features spans in the range of 69m and is supported on five touchdown points with free edges along its entire perimeter. After partly filling the valley between channels with concrete, the channels form an idealized tbeam and are able to carry the load of a roof floor. Because of the reinforcement, ferrocement does not need to be as thick as concrete, and designers consider it more as a tensile skin that can be made in just about any shape. Applications of ferrocement in construction is vast due to the low self weight, lack of skilled workers, no need of framework etc. The shingles must be smooth without curling, blisters, etc.
Pdf flexural behaviour of ferrocement roof panels researchgate. The crack initiation and failure mechanism of the ferrocement beams were greatly influenced by the shear span to depth ratio. Alternative material for secondary roofing elements. Make a ferrocement sheet of given dimension length 24 breadth 24 thickness 2 references. Ferrocement is a versatile construction material, with applications in low cost housing, rehabilitation and repair of structures. Ferrocement may prove a suitable material for lowcost roofing in developing countries. Ferrocement roof channels tency baetens auroville building centre avbc auroville 605 101 india synopsis a ferrocement roof channel is a longitudinal element, semicylindrical shaped. The applicability of ferrocement as an alternative material for secondary roofing slabs was investigated. Auroville building centre ferrocement roof channels september 2004 function as a roof, proper curing of the joined channels is the most important feature. It is also used in the manufacture of aggregate and for making construction blocks. Quality of ferrocement works are assured because the components are. Delaminations occur when ferrocement splits between layers.