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Bendable concrete patents

Laura HorcajadaLaura Horcajada

Did you know that up to 80% of bendable concrete information is contained in patent documents?

With > 100 million patents worldwide, the patent system is the most complete source of technology information available. Much of the information contained within patents cannot be found anywhere else, making patents a unique source of knowledge.

Below you will find a few patents related to bendable concrete.

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Self-compacting engineered cementitious composite (ecc)

Short fiber-reinforced engineering cementitious composites which are self-compacting, can be prepared by adding hydrophilic polymer fibers to a cement composition containing polymeric thickener and superplasticizer. The compositions are exceptionally ductile and exhibit many of the physical characteristics previously available only with hydrophobic high performance polyethylene fibers.

Publication number: WO0204378A2 | Search similar patents

Thermally adaptive ductile concrete

A Thermally Adaptive Ductile Concrete (PCM-ECC) having a tensile ductility ceramic with 5 times the thermal resistance, 2 times the specific heat capacity, and 400 times the tensile strain capacity of regular concrete.

Publication number: WO2014127208A1 | Search similar patents

A green engineered cementitious composite

The present invention discloses an engineered cementitious composite comprising a mortar matrix reinforced with polymeric fibres, in which the mortar matrix includes hydraulic cement, ground palm oil fuel ash, fine aggregates, a viscosifying agent and a water-reducing agent. An optimum design is used that involves producing palm oil fuel ash with the desired physical and chemical properties and grain size, along with the optimum mixing proportions that incorporate measures of palm oil fuel ash as a supplementary cementitious material, and polymeric fibres at a preferred fibre volume fraction, thereby reducing the level of cement use without compromising the mechanical and physical properties of the composite. This formulation provides a cost-effective alternative for producing durable concrete structures while promoting sustainable development and material greenness.

Publication number: WO2012115500A1 | Search similar patents

Fire resistant cementitious composite and method of making the same

The fire resistant cementitious composite is an engineered cementitious composite (EEC) having both flexural strength and fire resistant properties. The fire resistant cementitious composite includes a binder mixture formed from Portland cement and fly ash, sand, polyvinyl alcohol fibers, a polycarboxylic ether polymer and water. In the binder mixture, a weight ratio of the fly ash to the Portland cement is between approximately 1.0 and approximately 1.3. A weight ratio of the Portland cement to the sand is between approximately 0.85 and approximately 1.0. A weight ratio of the water to the binder mixture is between approximately 0.28 and approximately 0.33. The sand is preferably Arabian Gulf dune sand.

Publication number: US9290415B1 | Search similar patents

High early strength engineered cementitious composites

Rapid repair and retrofit of existing infrastructures demand durable high early strength materials that not only deliver sufficient strength within a few hours of placement but also significantly prolong the maintenance interval. The invention comprises a class of newly developed polyvinyl alcohol (PVA) fiber-reinforced high early strength engineered cementitious composites (ECC) materials featuring extraordinary ductility. The tailoring of preexisting flaw size distribution through non-matrix interactive crack initiators in the composite matrix results in high tensile ductility. The resulting high early strength ECC materials are capable of delivering a compressive strength of 21 MPa (3.0 ksi) within 4 hours after placement and retaining long-term tensile strain capacity above 2%.

Publication number: US2007181040A1 | Search similar patents

Engineered self healing cementitious composites

Cementitious composites engineered for self-healing, combining self-controlled tight crack width and extreme tensile ductility. Self-healing takes place automatically at cracked locations without external intervention. In the exemplary embodiment, fiber-reinforced cementitious composites with self-controlled tight crack width less than 50 μm and tensile ductility more than 2% are prepared. Self-healing in terms of mechanical and transport properties recovery of pre-damaged (by pre-cracking) composite is revealed in a variety of environmental exposures, include wetting and drying cycles, water permeation, and chloride submersion.

Publication number: US7572501B2 | Search similar patents

Light weight composite armor with structural strength

Future fighting vehicles will require lighter, stronger and more space efficient armor for better protection, better survivability and better mobility. The invented lightweight armor component consists of armor-grade material (2), such as ceramic, encapsulated in fiber reinforced cementitious composite (FRCC) (1). The encapsulation FRCC pre-stress the armor-grade material. The resulting armor component of the present disclosure provides excellent ballistic protection against most types and sizes of Kinetic Energy (KE) threats and Chemical Energy (CE) threats. The armor component has low areal density, reduced damage area, improved multi-hit capability, flexible design and also provides high structural strength. It furthermore has the advantage, that it can be formed in virtually any shape. The present disclosure results in superior ballistic characteristics of an armor component. An object of the present disclosure is to increase penetration resistance of especially ceramic based armor, while lowering system weight.

Publication number: WO2014023309A1 | Search similar patents

Collapse-resistant frame system for structures

A collapse-resistant frame system (10) for a bridge or building structure includes a plurality of mechanically-interconnected columns (12) and beams (14). At least the lowermost columns are formed of a material (28) that exhibits quasi-elastic behavior in response to seismic excitation, while the beams of the frame system are formed of a material (22) that exhibits elastic/plastic behavior, such that quasi-elastic flexure of the columns under seismic loading will cause plastic hinge formation in the beam ends (26) to thereby dissipate the rotational energy without significant plastic hinge formation in the column bases. In a disclosed embodiment, the column material is an engineered cementitious composite (ECC) matrix (30) reinforced with fiber-reinforced plastic (FRP) (32) to thereby provide a relatively-high flexural strength member having a relatively-lower flexural stiffness and higher elastic deformation limit, while the beam material is an ECC matrix reinforced with mild steel rebar (34) to thereby provide a relatively-lower flexural strength member featuring high energy-absorbing capacity.

Publication number: WO0204765A1 | Search similar patents

Process for increasing the ductility of high performance fiber-reinforced brittle matrix composites, and composites produced thereby

Purposeful addition of crack-initiating voids in the form of low tensile strength particulates, particulates having low matrix interaction, or gas bubbles formed by chemical reaction, in a size range of 0.5 mm to about 5 mm, and preferably of a size commensurate with or larger than naturally occurring crack-initiating gaseous voids, to fiber-reinforced strain hardening cementitious composites generates controlled and uniform cracking which increases strain hardening behavior in conventionally dense cementitious compositions.

Publication number: US2005241534A1 | Search similar patents

Micro-encapsulated crack resistant cement

A cement mixture is provided for preventing or reducing the formation of micro-cracks during hydration. The cement mixture includes both a conventional cement and a cement micro-encapsulated in a time-release polymer coating. The micro-encapsulated cement does not hydrate until a few hours to a few days after the bulk of the conventional cement has hydrated, thereby allowing for autogenous healing of small cracks.

Publication number: US2003000425A1 | Search similar patents

Strain hardening brittle matrix composites with high strength and high tensile ductility

A new class of ultra-high performance concrete with very high strength and very high tensile ductility (High Strength High Ductility Concrete) is provided that represents the culmination of two high performance cement-based composite systems, namely those of very high strength, and those of very high tensile ductility into a single composite system. The integration of high strength and ductility has been attained via the adoption of micromechanical analysis and design of fiber reinforced brittle matrix composites. In doing so, the new High Strength High Ductility Concrete material dramatically increases the energy absorption capabilities of structural systems employing this material, making it a very good candidate material where hurricanes, earthquake, impact and blast loads are a concern.

Publication number: US2013012625A1 | Search similar patents

Impact resistant strain hardening brittle matrix composite for protective structures

An extremely ductile fiber reinforced brittle matrix composite is of great value to protective structures that may be subjected to dynamic and/or impact loading. Infrastructures such as homes, buildings, and bridges may experience such loads due to hurricane lifted objects, bombs, and other projectiles. Compared to normal concrete and fiber reinforced concrete, the invented composite has substantially improved tensile strain capacity with strain hardening behavior, several hundred times higher than that of conventional concrete and fiber reinforced concrete even when subjected to impact loading. The brittle matrix may be a hydraulic cement or an inorganic polymer. In an exemplary embodiment of the teachings, the composites are prepared by incorporating pozzolanic admixtures, lightweight filler, and fine aggregates in Engineered Cementitious Composite fresh mixture, to form the resulting mixtures, then placing the resulting mixtures into molds, and curing the resulting mixtures.

Publication number: EP2205536A2 | Search similar patents

Cementitious pipes

A cementitious pipe as a tubular wall of fibre-reinforced cementitious pseudo strain hardening (PSH) matrix. The matrix and a wall thickness to diameter ratio within a range are such that the pipe exhibits characteristic behaviour in diametral quasi-static bending under a 3-edge bearing method. The behaviour is such that a stress versus relative displacement curve for the pipe exhibits a substantially linear elastic region having a first slope within first limits, and from the LOP to the MOR for the pipe, a PSH region which, beyond a possible transition region, has a slope which is less than that of the elastic region and is within second limits.

Publication number: EP1694996A1 | Search similar patents

Concrete construction employing the use of a ductile strip

The present invention relates to a concrete construction that comprises a concrete slab and a dustile strip adjacent the slab. The ductile strip comprises an engineered cementitious composite of cementitious material and reinforcing fibers with the ductile strip being directly bonded to the slab. The present invention also relates to a method of making or repairing a concrete construction, the method comprises providing a ductile strip adjacent a concrete slab, wherein the ductile strip is made of an engineered cementitious composite comprising cementitious material and hydrophilic and/or hydrophobic reinforcing fibers. The present invention further relates to a roadbed or building floors suitable for behicular traffic, the roadbed comprises a plurality of slabs and ductile strips comprising an engineered cementitious composite of cementitious material and reinforcing fibers.

Publication number: WO0204747A1 | Search similar patents

Railway tie using strain-hardening brittle matrix composites

Railway tie is based upon a fiber-reinforced brittle matrix composite material. The composite material is isotropic, demonstrating pseudo-strain hardening behavior in uniaxial tension, and material ductility by design, not relying on reinforcing bars or mesh embedded within concrete or other brittle cementitious matrices for durability, abrasion resistance, or crack width control. Reinforcing bars or mesh, pretensioned or otherwise, may be used within the tie to control the load capacity and load-deformation response. The properties of this fiber-reinforced brittle matrix composite material are adjusted to preferably work with casting, injection molding, or extrusion manufacturing methods.

Publication number: US2010012742A1 | Search similar patents

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