Tạp chí Vật liệu & Xây dựng - Bộ Xây dựng

Standardization of hydraulic binder materials – achivements and orientation of the Vietnam Institute for Building Materials

Tue, 28 Oct 2025 00:00:00 +0000

This paper provides an overview of recent standardization activities in the field of building materials conducted under the leadership of the Vietnam Institute for Building Materials (VIBM). The focus is placed on the group of hydraulic binders, encompassing standards for masonry cement, Composite Portland cement, ground limestone additive, ground granulated blast furnace slag (GGBFS), fly ash, and blended hydraulic binders. The formulation and adoption of these standards have significantly contributed to the improvement and harmonization of the Vietnamese national standards system (TCVN) with European Standards (EN). These efforts align with the objectives of technological innovation, efficient resource utilization, energy conservation, and CO₂ emission reduction. The outcomes of this work provide a solid basis for advancing the development of green and sustainable building materials in Vietnam.

Introduction about standard on paints and varnishes- pull off test for adhesion

Đàm Thị Mỹ Lương — Tue, 28 Oct 2025 00:00:00 +0000

The standard specifies methods for determining the adhesion of “paints, varnishes or related products” and is an accepted translation (equivalent) to ISO 4624. This standard provides three methods for determining the adhesion by carrying out pull-off tests on a single coating or a multi-coat system.

Study on the compressive strength of mortar and concrete using oyster shell aggregate as a river sand replacement

Lê Hoài Bão, Ngô Văn Thức, Võ Trung Kiên — Fri, 31 Oct 2025 00:00:00 +0000

This study evaluates the effect of using crushed oyster shell aggregate as a partial replacement for river sand on the compressive strength of mortar and concrete. Mortar specimens were prepared with river sand replacement rates of 0%, 5%, 10%, and 15%; the concrete mixture used the optimal 15% replacement level. The results indicate that, for mortar, the highest 28-day compressive strength was achieved at a 15% replacement level. For concrete, although the slump decreased by approximately 37.5%, the 28-day compressive strength remained comparable to that of the control mixture. The stability in compressive strength was attributed to the rough surface texture of the oyster shells and the contribution of CaCO₃ to secondary chemical reactions. This research highlights the potential of using oyster shell waste as a sustainable material in construction applications in Vietnam.

Introducing some draft standards for the field of building in glass for the year of 2025

Tue, 28 Oct 2025 00:00:00 +0000

In recent years, the work of developing new standards and reviewing current standards in the field of construction glass materials has always been carried out promptly to update and supplement changes in product quality standards, create compatibility in production and use to protect consumer rights, help businesses and the state manage products on the market. Therefore, the Ministry of Construction has assigned the Institute of Construction Materials to carry out the tasks of developing standards in the period of 2024-2025, including: Glass in building. Special basic products - Glass ceramics - Evaluation of conformity/Product standard, code TC 82-24; Glass in building – Glazing and airborne sound insulation – Measurement of the mechanical impedance of laminated glass, code TC 83-24; Glass in building. Determination of energy balance value. Calculation method, code TC 84-24; Bonding sealants. Bonded glazing sealants for direct light exposure, code TC 85-24; Glass in building - Determination of the emissivity, code TC 95-24 và Glass in building. Safety in case of fire, fire resistance. Glass testing methodology for the purpose of classification, code TC 96-24. These standards, when issued, bring positive benefits such as ensuring product quality, enhancing safety, promoting innovation to improve quality and facilitating international trade and integration.

Effects of BFRP retrofitting and cyclic loading on the load-bearing capacity of reinforced concrete beam-column joints

Võ Bá Huy, Đinh Hoài Luân, Đoàn Văn Đẹt, Cao Văn Vui — Tue, 28 Oct 2025 00:00:00 +0000

This paper investigates the effects of Basalt fiber reinforced polymer (BFRP) retrofitting and cyclic loading on bearing capacity of reinforced concrete beam-column joints with orthogonal beams. Experiments were conducted on eight beam-column joints. These joints were classified into four groups; each group had two joints. One group was not retrofitted (control group). Three remaining joints were retrofitted with various configurations. For each group, one joint was monotonically loaded and one joint was cyclically loaded. The results showed that damage mode was in the form of concrete crushing in the compression zone and concrete cracking in the tension zone. The damage was concentrated on the beams, while the damage did not appear on the columns. Under monotonic loading, BFRP retrofitting increased the ultimate load of the joints by about 8.5%. Under cyclic loading, BFRP retrofitting increased the ultimate load by 3.3–7.0% compared with that of the control joint. Cyclic loading had a great influence on the ultimate load capacity of the joints. Compared to the control joint subjected to monotonic load, cyclic loading reduced the ultimate load of the unretrofitted joint by 14.3% and the ultimate load capacity of BFRP retrofitted joints by 8.3–17.2%.