Home-immediately access 800+ free online publications. Download CD3WD (680 Megabytes) and distribute it to the 3rd World. CD3WD is a 3rd World Development private-sector initiative, mastered by Software Developer Alex Weir and hosted by GNUveau_Networks (From globally distributed organizations, to supercomputers, to a small home server, if it's Linux, we know it.)ar.cn.de.en.es.fr.id.it.ph.po.ru.sw

CLOSE THIS BOOKStabilizers and Mortars ( for compressed earth blocks) (GTZ, 1994, 20 p.)
VIEW THE DOCUMENT(introduction...)
VIEW THE DOCUMENTAcknowledgements
VIEW THE DOCUMENTIntroduction
VIEW THE DOCUMENTStabilizers
VIEW THE DOCUMENTMortars
VIEW THE DOCUMENTNatural products
VIEW THE DOCUMENTLime
VIEW THE DOCUMENTPortland cement
VIEW THE DOCUMENTGypsum
VIEW THE DOCUMENTBitumen
VIEW THE DOCUMENTSynthetic products
VIEW THE DOCUMENTSpecialized Commercial Products
VIEW THE DOCUMENTSelect bibliography

Specialized Commercial Products

I. INTRODUCTION

Description

A number of products are now commercially available. Many of these are presented by the manufacturers or their agents as "miracle" products. The importance of verifying the real performance of a product systematically, and of determining how well-founded the sales arguments are, which are put forward in publicity, oral presentations and laboratory reports, cannot be overstated.

The majority of these commercial products are based on known industrial products and behave in the same way. The turnover of these products on the market is very high: they appear under one name, disappear a short time later, only to reappear either under another name or manufactured by another company. Manufacturers do not always describe their product in precise detail, and keep their formula secret. It will be noted that the majority of these products are not patented. This is because they are already public property. To give an example, a product which IS 90% sulphuric acid will be described as "a liquid catalyst, soluble in water and inducing ion exchange". Consequently it appears to be essential to insist that salesmen identify their product exactly and, if necessary, obtain the advice of specialists (eg from chemical engineers). This precaution does not necessarily lead to these products being systematically rejected; some of them are effective, albeit for clearly specified applications.

Conditions of use

The quantities of these products used for stabilization purposes are usually extremely low, often in the order of 1% or 0.1%, or even 0.01%. The difficulty of achieving uniform mixing can thus be appreciated. For example, when processing one tonne of soil, the addition of one kilo of the product requires very thorough mixing and professional attention to the work.

Price surveys carried out by manufacturers usually indicate a price which IS well below that of cement or lime stabilization, which is usually used as a point of reference. However, as soon as the suggested quantity proves ineffective and the quantity required has to be increased, there is a distinct risk of exceeding the budget. Furthermore, the real retail price of these integrated products often includes an excessive profit margin, especially if one remembers that they are only moderately effective and that they are often very common industrial chemicals. Prices are set in relation to what the market will bear by comparison with conventional stabilizers. It is not uncommon to find that products with identical formulae can be purchased directly from suppliers of industrial chemicals at prices up, to 20 to 50% lower.

The use of such products may prove to be satisfactory, but it is essential to carry out preliminary tests and studies. In any event, it is advisable to find out if other users have obtained positive results.

II. FIELD OF APPLICATION

Origin of products

Many of the products on the market have been formulated for use inroad stabilization. A large number were developed in a military context, with a view to achieving the quickest possible stabilization of impassable roads or constructing landing strips and heliports on marshy ground in the space of just a few hours. The original purpose of these products should not therefore be forgotten. The demands imposed by the temporary stabilization of roads and their conditions of use are very different from those imposed by the construction of permanent buildings. Some of these products, which are highly effective on roads, rapidly lose their effusiveness when used to stabilize walls. Laboratory reports must be interpreted in the light of these applications m the field of road construction. Moreover a large number of tests and trials are carried out on samples prepared by the product manufacturers themselves. This practice, of course, makes it impossible for the laboratory to guarantee the product itself, even though the results obtained on the material can be guaranteed.

Stabilization

Most of these products are intended to be used as stabilizers for compressed earth blocks. A good number of them can also be used as stabilizers for plasters and renders.

COMMERCIAL PRODUCTS

PRODUCT

MANUFACTURER OR DISTRIBUTOR

COUNTRY

REMARKS

STABILIZERS

CONSERVEX

CONSOLID AG

Switzerland-France

Impermeabilizing agent to be used with CONSOLID 444

CONSOLID 444

CONSOLID AG

Switzerland-France

Compacting aid to be used with CONSERVEX

MUREXIN SB-86

FORSTER & HAENDEL

Austria

Probably of the same nature as the CONSOLID products

MUREXIN SB-99

FORSTER & HAENDEL

Austria

Probably of the same nature as the CONSOLID products

UNIVEST

HLST

Germany

Liquid polymer

RENDER ADDITIVES

ACROPOL

REX CANDY

Australia


DARAWELD- C

_

United States

High polymer resin emulsion

SUPERIOR ADDITIVE EL REY

United States

Acrylic modifier for renders


200




UNI 719

F.I.T.

Australia

Alkali metal alkyl silicone compounds

WATERPROOFERS

700 S

SICOF

France

Epoxy resin

ADOBE PROTECTOR EL REY

United States

Water repellent


DARAWELD- C

_

United States

High polymer resin emulsion

DYNASYLAN FH

DYNAMIT NOBEL

France

Silicon resin, silane

PROTIDRAL

SARL CYBEO

France

Silicone resin, siloxane

REPELLIN S-101

PIDILITE IND. LTD

India

To be sprayed or brushed

ROCAGIL AL 6

RHONE POULENC

France

Acrylic resin, organic polymer

SD 104

RHONE POULENC

France

Acrylic resin, organic polymer

SOIL SEAL

_

United States

Latex acrylic balanced polymers spray mixed with water

TO PREVIOUS SECTION OF BOOK TO NEXT SECTION OF BOOK