A novel admixture including an accelerator and a corrosion inhibitor, that accelerates the time required to set a concrete mixture at low temperature even in concrete containing a pozzolan such as fly ash. Scribd is the worlds largest social reading and publishing site. Three commercial inhibitors were used in the aus study. The invention relates to the use of a thiosulfate as a setting accelerator for a mineral binding agent composition, in particular a cementitious mineral binding agent composition, said thiosulfate comprising calcium thiosulfate, sodium thiosulfate andor potassium thiosulfate or is composed thereof. Packaging rheocrete cni admixture is available in 55 gal 208 l drums, 275 gal 1040 l totes, and by bulk delivery.
Coarse aggregate shall consist of crushed stone or gravel manufactured from clean, hard, tough, dense, basalt, free. The tensile creep and free shrinkage deformations of ultrahigh performance concrete uhpc were examined through shortterm testing to assess the influences of stressstrength ratio, steel fiber reinforcement, and thermal treatment. A corrosion cell comprising four concrete beams was constructed. Material safety data sheet rheocrete cni version 2.
Chemical composition rheocrete cni admixture contains a minimum of 30% calcium nitrite by mass as an active ingredient. Keep only in the original container in a cool, wellventilated place. The chemical inventory list section contains the names of all the chemicals located at the 1600 west broad street, office of materials management, building. Appoquinimink school district fairview campus new middle and high school castin place concrete revision 0 111417 03 30 004 1. An independent agency, acceptable to authorities having jurisdiction, qualified according to astm c 1077 and astm e 329 for testing indicated. Liquid alkalifree accelerators for sprayed concrete basf. Wo2014118052a1 accelerator for mineral binding agents. Manufacture bar supports from steel wire, plastic, or precast concrete according to crsis manual of standard practice. Louisville, ky sika cni corrosion inhibiting admixture sika corp. Unfortunately, this book cant be printed from the openbook. Okay, so, heres what i have been able to dig up so far. Application apply when air and substrate temperatures are between 40f 4c and 100f 38c. You find that any nitratenitrite can be used as an explosive if subjected to high temp high pressure because it will.
Rheocrete cni is recommended for use at a single dosage in order to eliminate the confusion and uncertainties related to determining the severity of the corrosive environment and predicting the chloride exposure of the structure. Concrete and structures books, all civil engineering concrete and structures books available on free for members online, download skip to content civil engineers pk. You find that any nitratenitrite can be used as an explosive if subjected to high temp high pressure because it will become unstable and outgas basically. Sika cni is a calcium nitritebased admixture designed to inhibit the. A chapter on corrosion inhibitors in a book on concrete admixtures needs three introductory remarks. Rheocrete cni admixture is identical in composition and mechanism to.
These units are intended for use in nonloadbearing partitions, but under certain conditions they may be suitable for use in nonloadbearing exterior walls above grade where effectively protected from the. Personnel conducting field tests shall be qualified as aci. Safety data sheet masterlife ci 30 also rheocrete cni. Basically rheocrete cni is calcium nitrite, an organic corrosion inhibitor. First, whereas concrete admixtures presented in the other chapters are added in order to improve properties of fresh or hardened concrete, corrosion inhibitors are added to prolong the service life of reinforced concrete, primarily acting at the steel surface. The chemicals are listed by individual laboratory sections. Plank shortterm and longterm deflection maximums shall not be greater than table 9. Identification product identifier used on the label masterlife ci 30 also rheocrete cni recommended use of the chemical and restriction on use suitable for use in industrial sector. Sika cni will help oxidize the steel to form ferric oxide.
Drawings and general provisions of the contract, including general and supplementary conditions and. Basf steel corrosion inhibitor product recognised in. Manufacture bar supports from steel wire, plastic, or precast concrete according to crsis manual of standard practice, of greater compressive. Pdf improving concrete durability through the use of. The list includes the name, quantity, and location of each item. Masterlife ci 222 admixture is a patented stateoftheart corrosioninhibiting admixture formulated to inhibit the corrosion of steel in reinforced concrete. Rheocrete cni, indicated better corrosion resistance with a higher dosage of. A suitable accelerator includes a mixture of a nonchloride type accelerator and a. Generate a free certificate of conformance for a specific basf construction product. Masterlife cni formerly rheocrete cni amasterlifecni80414 statement of responsibility made as to a products suitability for a particular the technical information and application advice given in this basf publication are based on the present state of. Concrete module group and consists of two parts, just as the main module. Option for specific area only to be proposed by the contactor and approved by e.
For pricing please contact your local sales representative pro flow is an innovative new product from the sarjeant company that raises the bar for castinplace concrete therefore eliminating the need for internal vibration. A local government perspective, municipal association of victoria. Pdf performance of corrosion inhibiting admixtures in a. Corrosioninhibiting admixture for steel reinforced concrete. Trial and basf product recognised in international journal of electrochemical science. Plank shortterm and longterm deflection maximums shall not be. Form work for column the wooden planks or steel panels used as mould, in which concrete is poured and the stand of ballies bamboos or steel posts is known as shuttering.
Wrinkle free application of the plastic sheet helps to ensure a uniformly colored surface. Sika cni corroson i nhibngii admxiure description sika cni is a calcium nitritebased admixture designed to inhibit the corrosion of steel in reinforced concrete. Overlap joints 6 inches and seal with manufacturers tape. The flexural test on concrete can be conducted using either three point load test astm c78 or center point load test astm c293. Recommended uses all rcc structures including precastprestressed and post tensioned applications.
Compatible with each other and free of intentionallyadded chlorides. Improving concrete durability through the use of corrosion inhibitors. Grind smooth any surface defects that would telegraph through applied coatings or floor coverings. Apply a trowel finish to surfaces indicated and to floor and slab surfaces exposed to view or to be covered with resilient flooring, carpet, ceramic or quarry tile set over a. Lap vapor barrierretarder over footings and seal to foundation walls. Masterlife cni formerly rheocrete cni corrosioninhibiting admixture for steel reinforced concrete description masterlife cni is a calcium nitrite based corrosioninhibiting admixture for steel reinforced concrete.
In addition to the elements of good concrete practice required by the aci building code, basf construction. Castinplace concrete lupe tortilla round rock 03 30 00 page 2 of 12 testing agency qualifications. Solvent room russtech lc 500 plastic gallon container 1. Fine aggregate shall be clean, hard, dense, free of foreign matter and shall consist of natural sand, manufactured fines, or a combination thereof. Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and weldedwire reinforcement in place. If you need to print pages from this book, we recommend downloading it as a pdf. The results of flexural test on concrete expressed as a modulus of rupture which denotes as mr in mpa or psi. Trial and basf product recognised in international journal. Concrete surfaces allows for realistic analysis of deformations, stresses and crack widths of members, slabs, elevated slabs, plates, walls, planar structures and shells made of reinforced concrete by considering.
Sika cni contains a minium of 30% calcium nitrite by mass and is formulated to meet astm c494 requirements for type c, accelerating admixture. Shortterm tensile creep and shrinkage of ultrahigh performance concrete. Bolsters, chairs, spacers, and other devices for spacing, supporting, and fastening reinforcing bars and welded wire reinforcement in place. Its typically a high compressive strength concrete mix. Corrosion inhibitors for reinforced concrete sciencedirect. Rheocrete cni calcium nitrite based corrosion inhibiting admixture is used for reinforced concrete. Pdf performance of corrosion inhibiting admixtures in a marine. This section specifies castin place concrete, including formwork. For applications outside this range of temperatures, contact prospec technical services. Drawings and general provisions of the contract, including general and supplementary conditions and division 01 specification sections, apply to this section.
Safety data sheet masterlife ci 30 also rheocrete cni revision date. Packaging rheocrete cni is available in 205l drums and bulk delivery. Storage, deliver, and handlingstore, and handle steel reinforcement to prevent bending and. Shortterm tensile creep and shrinkage of ultrahigh. Drawings and general provisions of the contract, including general and supplementary conditions and division 1 specification sections, apply to this section. Pdf corrosion of reinforcing steel is a major contributor to early deterioration of concrete structures in a coastal environment. Cover protruding metal with insulation, since metal can act as a heat sink to freeze surrounding concrete. Provide precast concrete stairs, stair platforms, and connections designed in accordance with aci 318 and capable of supporting the full unit dead load plus 100 psf live load. Also, commercially available high range water reducer hrwr, glenium 3030 ns, and accelerator, rheocrete cni, provided by basf were also used.
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