ACI 121R-08 Guide for Concrete Construction Quality Systems by ACI

By ACI

ACI 121R-08 advisor for Concrete building caliber structures in Conformance with ISO 9001 (Guide for Concrete development caliber structures in Conformance with ISO 9001)

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Additional resources for ACI 121R-08 Guide for Concrete Construction Quality Systems in Conformance with ISO 9001 (Guide for Concrete Construction Quality Systems in Conformance with ISO 9001)

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Unlike cement and its hardening products, wood is an organic material that is subject to natural decay and related changes to its properties, which can limit the durability of structural components made with it. • Wood shavings contain water-soluble constituents, which can interfere with the hydraulic hardening of cement and water to varying degrees. Mineralising the timber by-products can largely neutralise this negative effect. 5-times that of ordinary industrially produced types of wood. Wood shavings tend to segregate in fluid cement-bonded systems.

36 W/mK, and thus about a quarter lower than the standard German value for this relative density. The concrete Gartmann developed has been called “insulating concrete” in publications, although this is not a defined technical term. Some buildings with very light concrete exterior walls (approx. 1,100 kg/m3) have now been built in Germany. g. since the Energy Saving Ordinance (Energieeinsparverordnung EnEV) 2014, Minergie standard) means that some very high energy efficiency standards are required for new buildings in many European countries.

Approval or authorisation from the building regulation authorities in individual cases is required for the use of such concretes in Germany. Different European countries deal with the issue in various ways. Lightweight concrete technology distinguishes between structurally dense lightweight concretes and other types such as internally porous lightweight and aerated concretes, which are used mainly for their insulating properties. The latter systems contain mainly coarse, light aggregates and only a little cement mortar, so their individual particles adhere to each other only where they touch.

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