Construction provides the infrastructure necessary for the progress of modern societies and responds favorably to global economic dynamics. This performance is conducted through business performance, when formulating and executing this type of projects in Colombia. However, Its productivity is low, despite its support as a leading stimulator of production in times of crisis. Therefore, this research analyzed the macroeconomic environment of the construction and building subsector, through the selection and characterization of companies in Boyacá, Colombia, together with the identification of their capacities, estimated by the financial and organizational statements required in public bids. This analysis exposes the dependent and volatile market, mainly supported by housing construction activity. In Colombia, there is a reduction in productivity and in Boyacá, 95.83% of sole proprietorships do not have conditions to participate in public procurement. Consequently, despite institutional efforts to encourage production by investment in the building subsector, the nature of the market and the organizational limitations hinder the development of the sector and the Colombian economy in times of crisis.

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RESUMEN:Este trabajo presenta los resultados de la evaluación de propiedades de pastas de cemento comercial (CPC), mezcladas con ceniza volante (FA) y escoria de alto horno (GBFS). Inicialmente un total de 30 combinaciones fueron evaluadas en términos de resistencia a la compresión para establecer las proporciones óptimas de las materias primas. Después de esto, cuatro mezclas optimizadas fueron caracterizadas durante el proceso de fraguado y endurecimiento. Se realizaron ensayos electroquímicos en cilindros de concreto elaborados con los cementantes y con una varilla de acero de construcción embebida en su interior. Con el objetivo de evaluar el comportamiento frente a la corrosión se estudiaron aspectos termodinámicos y cinéticos. Los resultados mostraron que cementos comerciales mezclados con ceniza volante y escoria de alto horno, como los usados en esta investigación, presentan menor resistencia mecánica y a la corrosión que un cemento comercial. ABSTRACT: Effect of incorporation of fly ash and granulated blast furnace in the electrochemical behavior of concretes of commercial cement.This paper presents the findings of the research properties evaluation pastes of commercial cement (CPC), mixed with fly ash (FA) and granulated blast furnace slag (GBFS). Initially, the sample of 30 combinations were evaluated in terms of compressive strength to establish the optimal proportions from raw material. After that, four optimized blends were characterized during the setting and hardening process. Electrochemical tests were performed on concrete cylinders samples prepared with cementitious materials and a structural steel rod placed in the center of the specimen. With the objective to evaluate the performance before corrosion, thermodynamic and kinetic aspects were taken into consideration. The findings showed that commercial cements blended with fly ash and blast furnace slag as the ones used in this research presents a decreased behavior in mechanical and corrosion strength regarding to CPC.