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La pedra en sec. Materials, eines i tècniques tradicionals a les illes ...

La pedra en sec. Materials, eines i tècniques tradicionals a les illes ...

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*** * '<br />

:** *: 6 6.5.4 DRYSTONE MASONRY STRUCTURES<br />

Description<br />

Walled hole in which limestone was<br />

burnt or calcined to obtain lime.<br />

Uses<br />

This lime kiln is called forn de la Mare<br />

de Deu because it was built in 1857 to<br />

produce lime for the capella Fonda<br />

del Roser in the town's parish church<br />

(Ordines, 1995).<br />

Site<br />

Next to the cam! de Coanegra, near<br />

some crags.<br />

<strong>Materials</strong><br />

Limestone, clay, lime.<br />

Ground Plan<br />

Circular.<br />

Facings<br />

The round cavity measuring 1 m in<br />

depth by 5.30 m in diameter and called<br />

the "caixa" (box) has a single vertical<br />

facing which forms the heater. On<br />

the outside it has another wall with a<br />

wide base.<br />

Before calcining the limestone the<br />

interior walls were plastered with clay<br />

or pig muck so that the fire did not<br />

burn them.<br />

Roofing<br />

The drystone masonry roof called pa<br />

de figa (dried fig block) by the lime<br />

kiln workers, is shown in the drawing<br />

in its assumed form. This was not a<br />

perman<strong>en</strong>t feature as it was made of<br />

stone which was to be calcined. Thus<br />

every time lime was made a new roof<br />

had to be built.<br />

A vertical limestone wall called a<br />

pedrfs was built up from the bottom of<br />

the heater and at the op<strong>en</strong>ing the<br />

rows of stones were brought together<br />

to make a vault. At the same time the<br />

"olla" (the cooker) was filled with<br />

wood. Rubble was placed on the vault<br />

and covered with lime and clay leaving<br />

a v<strong>en</strong>t. The roof projected one<br />

metre above the outside walls of the<br />

kiln.<br />

Flooring<br />

The floor of the kiln, called the c<strong>en</strong>drer,<br />

was made of earth.<br />

Op<strong>en</strong>ings<br />

A large op<strong>en</strong>ing was left in the box to<br />

put in the stone and the wood and to<br />

extract the lime. As the kiln filled up<br />

the op<strong>en</strong>ing was covered with a stone<br />

and clay wall called a portada and a<br />

hole was left to light the fire and to<br />

feed it whilst calcining the lime. A<br />

large flat stone called an <strong>en</strong>fornadora<br />

was placed in the middle of the lower<br />

part of the portada at an angle and<br />

flanked by two smaller stones. These<br />

stones made it easier to put in the firewood.<br />

Accessory items<br />

It does not have any accessory items.<br />

Location<br />

Cami de Coanegra, Santa Maria del<br />

Cam!.

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