Lime mortar, 1.21

Lime mortars The use of cement has been heavily criticized by environmentalists for the energy and emissions involved in its manufacture and for its inappropriate use. Mortars for laying and grouting paving materials can be made using less environmentally costly lime in place of cement. 

A stucco of lime mortar will protect the sides. Mud can also be made into unfired bricks for "lump-wall" construction, but unless you have a suitable clay-containing soil, lime or cement must be added to make the bricks durable. 

The final ph value of this material lies within the neutral range. Since this medium no longer provides sufficient protection for steel reinforcement rods and offers only slight environmental resistance, it is usually used for the plastering of interior walls and for interior brick walls only, in the latter case often mixed with cement.400 The specific surface of lime mortar lies considerably beneath that of cement mortar (up to one order of magnitude) 404 The water content is similar to cement mortar. 

With regards to the sample taking locations of the individual samples, see Figs. 17f. Judging from the consistency, the material used to build the brick walls of buildings 5a and 5b is a mortar rich in sand but extremely poor in cement (extremely crumbly), covered with a lime mortar plaster. 

Lime mortar 2 1/4 parts sand, 1 part lime. Sample measurements 55x60x20 mm, 94 g (ca. 1.4 g/cm3) ... 

The cement mortar samples, in contrast to the lime mortar samples, exhibit a higher cyanide concentration by a factor of two. The higher iron content of the cement mortar samples may be the reason for this, since the cyanide content increases proportionally to the iron content (see the last column of Table 19). In addition, hydrogen cyanide adsorption was certainly favored by the higher inner surface area of the cement mortar as compared to lime mortar. 

But even Prof. Markiewicz and his colleagues, during the test fumigations performed by them, at least confirmed that moist cement mortar (as was used in the morgues of crematoria II and III) absorbs at least ten times more hydrogen cyanide than dry lime mortar (as used in the disinfestation chambers), as I had assumed for my calculations in this work. 

We do know that this cement mortar has generally a considerable higher tendency to absorb gaseous and liquid compounds than lime mortar as used in delousing facilities.147... 

That is due to its higher inner surface, i.e., like a fme sponge (here cement mortar) can absorbe more water than a course one (here lime mortar). W. Czemin, Zementchemie fiir Bauingenieure, Bauverlag, Wiesbaden 1977, p. 49f. (Engl. Cement chemistry and physics for civil engineers, ibid., 1980) cf. my report (note 19), chapter 2.5. 

In addition, it is generally known that cement and lime mortar are highly porous materials, comparable for instance with sponges.160 In such materials, there does not exist something like... 

What is milk of lime Mortar Cement Plaster Slaked lime Explain the hardening of mortar, cement, and plaster. 

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