Concrete is made up of two components, aggregates and paste. Aggregates are generally classified into two groups, fine and coarse, and occupy about 60 to 80 percent of the volume of concrete. The paste is composed of cement, water, and entrained air and ordinarily constitutes 20 to 40 percent of the total volume. In properly made concrete, the aggregate should consist of particles having adequate strength and weather resistance and should not contain materials having injurious effects.

This study explores the development of innovative composite mixtures using water-soluble polymers based on cement, aimed at enhancing the properties of conventional cementitious materials. Incorporating these polymers aims to improve the flexibility, durability, and water resistance of cement, addressing common challenges in construction materials. The research method involves the formulation of different composite mixtures, testing for mechanical strength, adhesion, and water impermeability, and comparing these properties to traditional cement mixtures. This article presents a comprehensive analysis of the experimental results, discussing the implications for future construction applications.

Sanoatda mis boyitish jarayonlaridan hosil bo‘ladigan texnogen chiqindilar — xususan, mis shlaki (copper slag) — ekologik muammo va chiqindilarni boshqarish zarurati tufayli katta ahamiyat kasb etadi. Ushbu maqolada mis shlakining kimyoviy va fizik xossalari, uning an’anaviy up-qum (fine aggregate) o‘rnini egallash salohiyati, beton va boshqa qurilish materiallarida qo‘llash imkoniyatlari hamda atrof-muhit va iqtisodiy jihatlardan foydalari tahlil qilinadi. Ko‘rib chiqilgan adabiyotlar bazasida mis shlakidan beton, geopolimer va boshqa maxsus materiallar ishlab chiqarishda foydalanish istiqbollari ko‘rsatiladi. Natijalar sanoat chiqindilarini aylana iqtisodiyotga jalb qilish va qurilishda tabiiy resurslardan foydalanishni kamaytirishga yo‘naltirilgan strategiyalarni asoslashga xizmat qiladi.

В данной статье изучены источники вибрации машинно-тракторных агрегатов, спектры шума на их рабочих местах.

The synthesis of flocculants based on polyacrylamide (PAM) represents one of the most important developments in industrial polymer chemistry. These flocculants are widely utilized in wastewater purification, mining, paper production, and chemical manufacturing, owing to their strong ability to aggregate fine particles and clarify water. The polyacrylamide molecule, due to its high molecular weight and the presence of amide functional groups, can easily form hydrogen bonds and electrostatic interactions with suspended particles, thus enhancing sedimentation efficiency. This article provides a comprehensive analysis of the synthesis processes, modification methods, and structural factors that determine the flocculation efficiency of PAM-based materials. Moreover, recent advances in environmentally friendly and smart polymer technologies are discussed, emphasizing sustainable approaches for future water treatment systems.

This article presents general guidelines for the design and calculation of technological lines. It includes the necessary calculations, technical requirements, and practical approaches to improve the efficiency of production processes and to ensure the optimal placement of equipment within bays. In addition, safety standards and the continuity of technological flows are taken into account in the organization of technological lines

The article discusses the issue of limited implementation of digital technologies in the public asset management system, despite their potential to improve efficiency, transparency, and accountability. The author argues that various factors, such as the lack of digital infrastructure, limited funding, resistance to change, and inadequate skills and training, have hindered the adoption of digital solutions. The article proposes several solutions to address these challenges, including the development of a comprehensive digital strategy, increased funding and resources for digital infrastructure, capacity building and training for staff, and the establishment of clear policies and standards for digital implementation. The author also emphasizes the need for collaboration between government agencies, private sector partners, and civil society to promote a culture of innovation and enable the successful implementation of digital technologies.  

Тиббий йўсиндаги мажбурлов чоралари сифатида умумий тартибли психиатрия муассасаси ҳақида ва уларни қўллаш тартиби кўриб чикилган.

An important distinguishing feature of the arbolite structure is that in the total volume of the arbolite mass, the organic aggregate occupies 80-90% and has anisotropic properties inherent in wood. when used as an alkaline component - a complex alkaline component –KSK - I, the period of formation of the coagulation’ structure (the period of intensive absorption by the filler of alkali from the solution mixture) It is 240 min.

В статье представлена ​​информация о роли пустынных пастбищ в аграрном секторе Республики Узбекистан, традиционных методах адаптации растений пустынных пастбищ к условиям глобального изменения климата, их недостатках, созданной на основе научных подходов ресурсосберегающей технологии, предложенной для устранения недостатков, результатах, полученных при ее применении, и ее экономической эффективности.

This article describes the methods of removal of intermediate transducers used in the design of machines of integrated mechatronic systems and their advantages, problems in the application process and ways to overcome them.

Bugungi  kunda  dunyo  bo‘yicha  886,9  mln.  gektar  maydonlarda tuproqqa ishlov beriladi va qishloq xo‘jaligi mahsulotlari etishtiriladi. Uning 43,8 foiz qismida  yangi  rusurstejamkor,  minimal  va  nol  texnologiyalari  hamda  ularni  amalga oshiradigan  texnika  vositalari  joriy  etilgan.  Ushbu  zamonaviy  texnologiyalar  118 mln.   gektar   maydonlarda   tuproqning   unumdorligini   saqlash   bilan   bir   vaqtda etishtirilayotgan mahsulot tannarxini o‘rtacha 25 foizga kamaytirish imkonini beradi.