Esta dissertaÃÃo analisa as experiÃncias sindicais dos trabalhadores da construÃÃo civil de Fortaleza no perÃodo compreendido entre meados da dÃcada de 70 e 90. Analisando as peculiaridades do mundo do trabalho na construÃÃo civil, particularmente o cotidiano operÃrio nos canteiros de obras, o estudo procura destacar o desenvolvimento da oposiÃÃo sindical no ano de 1988 com uma proposta de reorganizaÃÃo das relaÃÃes sindicais que eram desenvolvidas pela direÃÃo do sindicato desde 1976, e assim refletir sobre o estabelecimento de uma convergÃncia de interesses em relaÃÃo aos operÃrios da categoria. Assim, analisamos como foram construÃdas as primeiras experiÃncias nessa categoria a partir das concepÃÃes polÃtico-sindicais da nova diretoria: o I congresso dos trabalhadores da construÃÃo civil, as primeiras greves gerais, a elaboraÃÃo do novo estatuto e suas diretrizes polÃtico-jurÃdicas, o projeto de educaÃÃo popular, a construÃÃo do jornal operÃrio, as atividades de lazer e o desenvolvimento de redes de solidariedade nos momentos de agudizaÃÃo nos embates com os empresÃrios do setor sÃo algumas dessas experiÃncias que, ao serem construÃdas pelos operÃrios, eles acabavam por se construir enquanto agentes protagonistas no seu mundo de trabalho. / This composition analyzes the syndical experiences of the workers of the civil construction of Fortaleza in the period between the 70âs and the 90âs. Analyzing the peculiarities of the world of the work in the civil construction, particularly the daily laborer in the seedbeds of workmanships, the study wants to detach the development of the syndical opposition in 1988 with a proposal of reorganization of the syndical relations that were developed by the direction of the union since 1976, and this way reflect on the establishment of a convergence of interests in relation to the laborers of the category. Thus, we analyze how the first experiences in this category from the politician-syndical conceptions of the new direction had been constructed: the I congress of the workers of the civil construction, the first general strikes, the elaboration of the new statute and its politician-legal lines of direction, the project of popular education, the construction of the laboring journal, the leisure activities and the development of nets of solidarity at the moments when the conflict with the entrepreneurs of the sector became hard are some of these experiences that, when being constructed by the laborers, finished for constructing themselves agents protagonists in their world of work.