The outbreak of COVID-19 has adversely affected university students’ learning process, especially in developing countries like Nigeria. Consequently, many institutions have adopted social media for the learning process because of the COVID-19 lockdown. Hence, the current study aimed at assessing the influences of social media learning environments on the learning process among university Architecture, Engineering, and Construction (AEC) students during the COVID-19 Pandemic lockdown. Data was collected from the students of AEC-related courses using a structured questionnaire. Warp 7.0 PLS-SEM was used for the analysis of the collated data and model development. The study results indicated that the AEC students’ psychological capital (PsyCap) moderates the relationships between social media learning environments and the learning process among AEC university students in Nigeria. The results also showed significant influence change between the social media learning environments and the learning process among the AEC students in Nigeria. The study is limited to students in the AEC-related courses in Nigerian universities. Moreover, the results of this study could be helpful to other developing countries having issues with the use of social media learning environments. The study further recommends the training of AEC students on the use of resources in the social media learning environments for the positive developmental state of the student’s self-efficacy, hope, optimism, and resilience.

The paper reports on an assessment of the mediation effect of a firm’s business partnership on procurement planning factors influencing the quality performance of primary healthcare building facilities. A quantitative data collection approach was adopted in the study using structured questionnaires circulated to 520 respondents comprising project managers in the Nigerian construction industry. A stratified proportionate random sampling method was used for the selection of respondents which yielded 370 responses and 357 were used for analysis. Findings were that procurement planning factors influenced the quality performance of primary healthcare building facilities, and the firm’s business partnerships mediate the relationship between procurement factors and quality performance of primary healthcare building facilities. This study serves as awareness to governments and other stakeholders in the construction industry on the provision of quality primary healthcare building facilities by leveraging a firm’s business partnership as a mediating factor. Findings show that the relationship would enhance the rapid provision of quality healthcare building facilities for the growing population of Nigeria and other developing countries facing similar shortages of quality healthcare building facilities.

Several studies have attributed high maternal mortality and morbidity rates in rural areas of developing countries including Nigeria to poor budget performance in the provision of primary health care (PHC) facilities. Yet, very little studies focused on the effects of factors affecting budget implementation for the successful delivery of PHC building facilities in the rural areas of Nigeria. Thus, this study assesses the factors affecting budget implementation for successful delivery of PHC building facilities in northern Nigeria. A sample of 317 respondents from a population of 1777 project managers was administered questionnaires through stratified proportionate random sampling technique. The survey attains 87% valid response rate. Data obtained were analyzed using warp5 PLS-SEM software. The results indicated low effects of factors affecting budget implementation on the successful delivery of PHC building facilities in northern Nigeria. Similarly, linear relationships exist between budget implementation factors and successful delivery of PHC building facilities. Moreover, the study provided criteria for assessing the effects of budget implementation factors affecting successful delivery of PHC building facilities in northern Nigeria and other developing countries that are facing similar problems. The study solicited for the improvement on the budget implementation of PHC sector through adequate budget and monitoring bases for mitigating maternal mortality and morbidity rates in the rural areas of developing countries through successful delivery of PHC building facilities.

Performance of small-scale building construction contract business poses a challenge to the sustainable development of the construction industry, particularly in developing countries like Nigeria. Small-scale construction contract business plays an important role in the economic development of any nation. In Nigeria, small-scale construction contract business has a tremendous role in the development of rural areas. This study assesses the mediation effects of client support with advance payment on cost factors that affect performance of small-scale contract businesses in Nigeria. The study identified three factors that affect cost performance of construction projects in developing countries: cash flow problems, effects of fraudulent practices, and effects of the nature of construction environments. In total, 550 survey questionnaires were administered to stakeholders in the Nigerian construction industry. Stratified proportionate random sampling method was used for the selection of respondents and 387 questionnaires were returned, with 357 used in the analysis.

The mechanism of achieving self-compacting concrete (SCC) leads to either high shrinkage or it affects the mechanical properties of the concrete. Therefore, there is a need for blended pozzolanic materials for the production of SCC to improve its properties. The tests conducted on the fresh SCC were filling ability, passing ability, segregation resistance. While on the hardened SCC were density, compressive strength, tensile strength, water absorption, and ultrasonic pulse velocity test. At a fresh stage, the addition of the blend improved the flow and segregation resistance of the SCC produced. SCC produced with the addition of up to 20% of the blends at 7 days of curing had an 8% higher strength. At 150 days, all the SCC specimens have the same range of strength. The water absorption capacity of SCC with the addition of the blend up to 20% was found to be 12% less than that of the control specimens. Cement replaced with up to 20% blend of RHA and MK can be used to produce SCC with improved early (7 days) and later strength. It is recommended that when SCC is to be produced with a blend of RHA and MK, 20% is the optimum level of cement replacement.

An essential part of education is student learning. Good quality education is based mainly on how well student attains knowledge. One way to achieve this is to simplify and provide user-friendly platforms and content that make it as intuitive as possible. This could be challenging, especially for Architecture, Engineering, and Construction (AEC) courses. Such courses require both practical and technical contacts. More contact periods are needed to keep students abreast with the technical and practical aspects of the growing needs and challenges within the AEC industry. Therefore, this study assessed the effects of social media learning environments on the AEC learning process. Data was collected from the students of AEC-related courses using a structured questionnaire. Warp 7.0 PLS-SEM was used for the analysis of the collated data and model development. The study results indicated that social media learning environments positively relate to the AEC courses learning process. The YouTube learning environment had a significant effect change on the AEC learning process. Similarly, the results further indicate that Facebook, Twitter, and Instagram had moderate effects on the AEC learning process. The study is limited to only students of AEC-related courses in Abubakar Tafawa Balewa University Bauchi, Nigeria. Moreover, the results of this study could be helpful to other developing countries having issues with the learning process among students of AEC-related courses. The study recommends the adoption of social media learning environments among universities offering AEC courses in Nigeria.