Bélidor, Bernard Forest de, La science des ingenieurs dans la conduite des travaux de fortification et d' architecture civile

Table of Notes

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                <pb o="80" file="0266" n="276" rhead="LA SCIENCE DES INGENIEURS,"/>
              des petits bacquets de planche faits exprès; </s>
              <s xml:id="echoid-s5716" xml:space="preserve">ce mélange doit ſe fai-
                <lb/>
              re à pluſieurs repriſes, ſans y mettre de l’eau que la premiere
                <lb/>
              fois.</s>
              <s xml:id="echoid-s5717" xml:space="preserve"/>
            </p>
            <p>
              <s xml:id="echoid-s5718" xml:space="preserve">Avant d’apliquer le ciment ſur les voutes, il eſt neceſſaire que
                <lb/>
              la maçonnerie ſoit bien achevée, & </s>
              <s xml:id="echoid-s5719" xml:space="preserve">qu’elle ait eu au moins cinq
                <lb/>
              ou ſix mois de tems pour ſecher & </s>
              <s xml:id="echoid-s5720" xml:space="preserve">prendre ſes affaiſſemens, l’on en
                <lb/>
              grate & </s>
              <s xml:id="echoid-s5721" xml:space="preserve">foüille les joints avec un petit crochet de fer, après quoi
                <lb/>
              on nétoye bien le deſſus, que l’on arroſe en y jettant de l’eau avec
                <lb/>
              un arroſoir, puis l’on aplique le ciment tout fraichement demêlé,
                <lb/>
              de l’épaiſſeur d’un pouce & </s>
              <s xml:id="echoid-s5722" xml:space="preserve">demi, qu’on étend bien également, on
                <lb/>
              le bat de long & </s>
              <s xml:id="echoid-s5723" xml:space="preserve">de large, avec de petites battes de deux pouces
                <lb/>
              de largeur ſeulement, pour mieux preſſer le ciment dans les joints,
                <lb/>
              enſuite avec des fers polis, comme ceux dont on ſe ſert pour re-
                <lb/>
              paſſer le linge, & </s>
              <s xml:id="echoid-s5724" xml:space="preserve">retrouſſés par les bouts en adouciſſant, l’on rend
                <lb/>
              la premiere couche unie juſqu’à ce qu’elle commence à s’affermir,
                <lb/>
              on broüille tous les jours pendant un tems ſa ſuperficie, avec un
                <lb/>
              torchon de drap, gros comme la tête, emmenché au bout d’un bâ-
                <lb/>
              ton, & </s>
              <s xml:id="echoid-s5725" xml:space="preserve">trempé dans un ſeau de ciment delayé, on paſſe auſſi-tôt le
                <lb/>
              liſſoir deſſus, après cela on couvre tout le couchi avec des paillaſſons,
                <lb/>
              juſqu’au lendemain, afin que les chaleurs ne le faſſent point gerſer,
                <lb/>
              l’on repete cette manœuvre, c’eſt-à-dire, l’on broüille, on liſſe,
                <lb/>
              & </s>
              <s xml:id="echoid-s5726" xml:space="preserve">on recouvre, tant qu’on s’aperçoive qu’il n’y a plus de gerſure
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              dans la ſuperficie; </s>
              <s xml:id="echoid-s5727" xml:space="preserve">cela fait on broüille encore pendant cinq ou ſix
                <lb/>
              jours de ſuite ſans liſſer, ni paillaſſonner.</s>
              <s xml:id="echoid-s5728" xml:space="preserve"/>
            </p>
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              <s xml:id="echoid-s5729" xml:space="preserve">En appliquant les chapes de ciment, on aura ſoin ſur toute cho-
                <lb/>
              ſe de les rendre bien unies, & </s>
              <s xml:id="echoid-s5730" xml:space="preserve">de terminer le ſommet des voutes
                <lb/>
              en dos d’âne, avec des pentes dirigées comme celle des toits; </s>
              <s xml:id="echoid-s5731" xml:space="preserve">en
                <lb/>
              conſtruiſant la voute, l’on fera enſorte qu’elle ſoit également cein-
                <lb/>
              trée, & </s>
              <s xml:id="echoid-s5732" xml:space="preserve">bandée ſur le ceintre, ne ſe ſervant que de mortier choi-
                <lb/>
              ſi, & </s>
              <s xml:id="echoid-s5733" xml:space="preserve">que la pierre qu’on mettra en œuvre ſoit bien apareillée: </s>
              <s xml:id="echoid-s5734" xml:space="preserve">ſi
                <lb/>
              au lieu de pierre l’on employe de la brique, on choiſira la mieux
                <lb/>
              cuite, dont on fera quatre ou cinq voutes repetées l’une ſur l’au-
                <lb/>
              tre, & </s>
              <s xml:id="echoid-s5735" xml:space="preserve">chacune d’elles bandée, & </s>
              <s xml:id="echoid-s5736" xml:space="preserve">bien fichée de coins ſous les clefs
                <lb/>
              ſeparément, & </s>
              <s xml:id="echoid-s5737" xml:space="preserve">lors qu’on apliquera les chapes de ciment, l’on pren-
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              dra bien garde qu’elles couvrent toutes les parties de la maçonne-
                <lb/>
              rie, de façon qu’aucune pierre ne ſe montre au travers, on cou-
                <lb/>
              vre enſuite la chape de ciment, d’un lit de gros ſable ou gravier,
                <lb/>
              de quatre à cinq pouces d’épais, qu’on étend également par tout;
                <lb/>
              </s>
              <s xml:id="echoid-s5738" xml:space="preserve">ſur celui-ci on en met un autre de terre, d’un pied & </s>
              <s xml:id="echoid-s5739" xml:space="preserve">demi bien
                <lb/>
              battu, & </s>
              <s xml:id="echoid-s5740" xml:space="preserve">on continue demême de lit enlit, juſqu’au parfait terraſſe-
                <lb/>
              ment: </s>
              <s xml:id="echoid-s5741" xml:space="preserve">c’eſt ainſi qu’on en a uſé pour couvrir les voutes des tours </s>
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