BETEC® EXPANSITnon-explosive demolition agent

M o r t a r S y s t e m s

P R O D U C T I N F O R M A T I O N

BETEC®

ter of up to approx. 8 mm, dependingon the structure of the reinforcement,will be overstretched. To use EXPANSITno big or heavy machines are needed.The space required depends on theholes chosen. The only vibrations occurwhile making the drill holes. No specialpermits are necessary (as in the caseof explosive agents).

Fields of application EXPANSIT is used as an explosion/vibration-free explosion agent for de-

molition work of concrete, reinforcedconcrete, rock, and mineral structures.The main fields of application are asfollows:• bridge construction• power/chemical plant construction• building/civil and underground

construction• quarry• purification plants

Specifications for usingFirst of all the necessary drillings with adiameter of 40 mm have to be made inthe necessary depth. Drilling machinesdriven by compressed air are recom-mended as they remove at the sametime remaining particles from the drillhole. As to the distance between thedrill holes, please consult the abovelist. The holes have to be clean and drybefore the filling. After that, EXPANSITand the maximum quantity of water(max. 25%) are added; don’t stopmixing then. The mixing is effected by adrill machine with a twirl attachmentuntil the mixture is homogeneous, thinand lump-free. The mixing should lastfor 4 minutes (not more, not less); other-wise the reaction starts too early. Makesure you only mix a quantity that can beused at once. The homogeneous mix-ture is poured into the drilled holes asimmediately as possible. This can beeffected out of the pack itself or via afunnel.Generally, you must never put weighton the filled drill holes, only cover themif necessary. Direct sun light should beavoided. In case of a larger drill-holegrid, fill the holes from the inside to theoutside since then the expansion pres-sure has its maximum efficacy. EXPAN-SIT is poured into the previously drilledholes. If you should have mixed toomuch material, spread it and do not

leave it in the pack; after you have ad-ded the water the chemical reaction willtake place after a few minutes.The temperatures of the prefabricatedcompound units (see Technical Data)should never exceed +25 °C. The ex-pansion pressure is released due to achemical reaction; with temperatureshigher than +25 °C, blow-outs are pos-sible.

Recommendation:It is always advisable to make sometest explosions in previously drilledholes. Start with smaller drill-hole grids.The efficacy of EXPANSIT depends onthe temperature and of the characteris-tics of the respective object. Choose asmaller drill-hole grid if the objectshould be highly reinforced. After beingused, the tools must thoroughly be cleaned with water.

Product Description EXPANSIT is an explosion/vibration-freedemolition agent. It is used for demoli-tion work when ever conventional blas-ting is not allowed. The expansion pres-sure of 8000 t/m² ensures a noiselessand controllable demolition. EXPANSITis used for a vibration-free, non-explo-sive demolition agent. It is a cement-grey powder which is stirred with anindicated max. quantity of mixing waterand then poured into the previously drilled holes. After a short reaction-timean expansion pressure of more than8000 t/m² is being built up. This expan-sion pressure exceeds the tensilestrengths of concrete or rock. If usingthis agent with blocks of reinforced steelthe existing reinforcements of a diame-

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Technical Data

BETEC EXPANSIT

setting time (20 °C) min approx. 10-15(depending on the temperature) if possible use immediately

setting temperature min. /max. °C +10/+25(temperature precast element)

temperature of mixing water °C approx. 10

max. water quantity l #2,5per 10 kg pail

consumption of dry powder kg/m³ 1.650

consumption d = 40 mm kg/lfdm 2,1of drill-hole length

consistence liquid

density kg/dm³ 2,06

diameter of drill-hole = d mm 40

distance between drill-holes = a a = (8 bis 16) x ddiameter of drill-holes = d

depths of drill-holes = L L = 0,8 x ttotal depth = t

Preparation of the foundationThe walls of the drill hole have to beremoved from dust; stagnant water alsohas to be removed from the drill holes.The object to be demolitioned has to befrost-free.

Special indicationProtect the demolition-object from sun-light or rain by means of tilts.Do not fill glass or steel bottles of anyvessels that become narrower towardsthe top.Never look into drill holes. Always wear

an eye protection and plastic gloves.Mark the demolition area to make surethat not authorized people do not enter.Make children stay away. – Instructionsaccording safety data sheet have to befollowed.

Size of delivery 10 kg plastic-pail

Storageto be stored in dry, frost-free locations,in the not yet opened packs;best before 12 months

Instructions according to the safety data sheet have to be followed!

Visit our website: www.graceconstruction.comE-mail: info.betec@grace.com

Grace Bauprodukte GmbH · Alte Bottroper Str. 64 · D-45356 Essen · Tel. +49 (0)201 86 147-0Order processing: Tel. +49 (0)201 86 147- 53+35 · Fax +49 (0)201 86 147- 59

BETEC is a registered trade name of W.R. Grace & Co. - Conn.

We hope the information here will be helpful. It is based on data and knowledge considered to be true and accurate and is offered for the user’s consideration, investigation and verification, but we do not warrant the results to be obtained. Please read all statements, recommendations or sug-gestions in conjunction with our conditions of sale which apply to all goods supplied by us. No statement, recommendation or suggestion is intendedfor any use which would infringe any patent or copyright.

For this product patents or patent-applications possibly do exist. Copyright 2005. W. R. Grace & Co.-Conn. 6.10 - 07/07

BETEC®