Building with Earth: Design and Technology of a Sustainable Architecture

little bit thinner than for pouring. It can be

pumped up to heights of two storeys using

hoses. Illustration 10 .17shows the example

of a 300-year-old half-timbered house

restored in Germany, where the mix was

prepared by a regular mobile concrete

mixer, funnelled into a pump, and then

piped to the formwork.

Surface treatment

After removing the formwork, the surface

of tamped, poured or pumped mineral loam

walls with densities of 600 to 900 kg/m^3

can be seen to be fairly hard, albeit rough

(10 .18). This surface need only be plastered

with a single thin layer (unlike equivalent

87 Tamped lightweight loam

10 .13Pouring mineral
loam in lost formwork
10 .14 t o 10 .15Study
models for interior walls
using lightweight mineral
loam and lost formwork
of textile stressed by
cables
10 .16Vertical section and
horizontal section show-
ing the ceiling pattern for
a bathroom with a central
skylight

10 .15

10 .16

10 .14